Nearly 70% of researchers say they have unknowingly cited a non-peer-reviewed source at some point in their academic career. If you have ever asked yourself "how to know if something is peer reviewed," you are not alone. Whether you are writing your first literature review or managing references across a multi-year research project, verifying that your sources have undergone rigorous expert evaluation is one of the most important steps in building credible, publishable work.
This guide walks you through exactly how to tell if an article is peer reviewed — with practical, step-by-step methods you can use right now.
What is a peer reviewed article?
A peer reviewed article is a piece of scholarly writing that has been evaluated by independent experts in the same field before publication. These reviewers — typically two or three specialists selected by the journal's editor — assess the article's methodology, data analysis, reasoning, and conclusions to determine whether the research meets the standards of the discipline.
The peer review process acts as a quality filter for academic publishing. It exists to catch errors, challenge weak reasoning, and ensure that published research makes a genuine contribution to the field. Journals that use this process are often called refereed journals or scholarly journals, and the terms are generally interchangeable.
Key point: not everything published in a peer reviewed journal is actually peer reviewed. Editorials, letters to the editor, book reviews, and opinion pieces typically bypass the review process. Only original research articles and review papers go through full peer evaluation.
Why peer review matters for credible research
Peer review is the academic world's primary trust signal. When a paper has been peer reviewed, it means that independent experts have verified the work before it reaches the public. For researchers, citing peer reviewed sources strengthens the credibility of your own work, satisfies the standards most journals and institutions require, and protects you from building conclusions on unreliable foundations.
Here is why this matters in practice:
Institutional requirements. Most universities, funding agencies, and journals require that your literature reviews draw from peer reviewed sources. Submitting work that cites non-reviewed material can lead to rejection or revision requests.
Citation integrity. Studies estimate that citation error rates in published papers range from 25% to 54%, with some errors traceable to citing sources that were not properly vetted. Verifying peer review status before you cite is one of the simplest ways to reduce this risk.
Avoiding predatory journals. The growth of predatory publishing — journals that charge fees but provide little or no genuine peer review — makes it more important than ever to know how to verify what you are reading. Estimates suggest there are now over 15,000 predatory journals in circulation.
If you are managing a research project with multiple collaborators, keeping track of which sources have been verified as peer reviewed becomes even more critical. A platform like ScholarDock, a research project and reference management platform, lets you tag and organize sources by their review status so your entire team works from a vetted library.
How to tell if an article is peer reviewed: 7 reliable methods
There is no single way to confirm peer review status, so experienced researchers use multiple strategies. Here are seven practical methods, ordered from fastest to most thorough.
1. Use the peer review filter in academic databases
The fastest method is to search for articles through an academic database that includes a peer review filter. Databases like PubMed, Scopus, Web of Science, EBSCO (Academic Search Complete), ProQuest, and JSTOR let you limit your results to peer reviewed journals only.
How to do it:
Run your keyword search in the database
Look for a checkbox or filter option labeled "Peer-Reviewed," "Scholarly (Peer-Reviewed)," or "Refereed"
Apply the filter before reviewing your results
This is the most reliable starting point because these databases maintain curated lists of verified peer reviewed journals. If your institution provides access to any of these databases, start here.
2. Check the journal's official website
If you found an article outside of an academic database — through Google Scholar, a colleague's recommendation, or a preprint server — go directly to the journal's official website.
What to look for:
Navigate to the "About" or "For Authors" page
Look for language like "all submissions undergo peer review," "double-blind review process," or "manuscripts are evaluated by independent referees"
Check the editorial board — reputable peer reviewed journals list their editors and reviewers, who should be established researchers at recognized institutions
Watch out: some journals claim to be peer reviewed but provide only superficial review. Cross-reference the journal against known predatory publisher lists such as Beall's List or Cabell's Predatory Reports if you are unfamiliar with the publication.
3. Look up the journal in Ulrichsweb
Ulrichsweb (also called Ulrich's Periodicals Directory) is a global database of over 300,000 periodicals maintained by ProQuest. It is the standard tool librarians use to verify whether a journal is peer reviewed.
How to do it:
Access Ulrichsweb through your university library (most academic institutions have a subscription)
Search for the journal by title or ISSN
Look for the referee shirt icon next to the journal title — this confirms peer review status
Click the title to see additional details, including publisher, frequency, and subject area
If you cannot access Ulrichsweb, ask your institution's reference librarian — they can check for you in minutes.
4. Examine the article itself for peer review indicators
A peer reviewed article typically has a recognizable structure and set of features that distinguish it from popular or trade publications. Examining the article directly is useful when you cannot verify the journal through other means.
Indicators that an article is peer reviewed:
Structured format: abstract, introduction, methodology, results, discussion, and references sections
Author credentials: authors list institutional affiliations (universities, research labs, hospitals)
Article history dates: look for "Received," "Revised," and "Accepted" dates — these indicate the manuscript went through a review cycle
DOI and volume/issue numbers: peer reviewed articles are almost always assigned a Digital Object Identifier and published in a numbered volume and issue
References and citations: a substantial reference list citing other scholarly work
Technical language: written for an expert audience, not the general public
Minimal or no advertising: peer reviewed journals focus on content, not commercial promotion
5. Check the journal's masthead and submission guidelines
For print journals or when browsing a journal's archive, the masthead (usually found near the front or back of an issue) contains publication details including the review process.
Look for submission instructions that reference sending multiple copies of a manuscript or submitting through a peer review management system. Language like "manuscripts will be reviewed by at least two independent reviewers" confirms the journal uses peer review.
6. Use Google Scholar's cited-by data
While Google Scholar does not have a built-in peer review filter, you can use it as a supporting verification tool:
Search for the article on Google Scholar
Check the "Cited by" count — articles cited frequently by other scholarly sources are more likely to be peer reviewed
Click through to the journal's page to verify using methods 2 or 3 above
Look at whether the citing articles themselves come from recognized peer reviewed journals
Google Scholar indexes a wide range of sources, including non-peer-reviewed material, so always verify the journal rather than relying on Google Scholar's inclusion alone.
7. Ask a librarian or use your institution's resources
When you have exhausted the above methods and are still unsure, a reference librarian can help. Academic librarians are trained to identify scholarly references and have access to tools and directories that may not be publicly available. Many university libraries also publish online guides specifically for identifying peer reviewed sources.
What does a peer reviewed article look like?
Understanding the visual and structural differences between peer reviewed articles and other types of publications helps you make quick judgments when scanning sources. Here is a comparison:
If an article checks most of the boxes in the "peer reviewed" column, you are likely working with a credible scholarly source.
Peer reviewed vs. scholarly: is there a difference?
This is a common point of confusion, and it matters when you are building a reference library of credible sources.
Scholarly means the article was written by an expert for an audience of other experts, researchers, or students. Peer reviewed means the article was also evaluated by independent specialists before publication. The vast majority of scholarly articles are peer reviewed, but not all of them are. For example, some law reviews are edited by students rather than independent peer reviewers, and some scholarly essays or opinion pieces in academic journals may not go through formal peer review.
When your professor, advisor, or journal guidelines require "peer reviewed" sources specifically, make sure the article has gone through the formal review process — not just that it appears in a scholarly journal.
How to spot predatory journals pretending to be peer reviewed
The rise of open-access publishing has brought tremendous benefits to science, but it has also created an opening for predatory journals — publications that charge article processing fees while providing little or no genuine peer review. Researchers, especially early-career academics under pressure to publish, are particularly vulnerable.
Red flags to watch for:
Aggressive email solicitations asking you to submit manuscripts, often with flattering language
Unusually fast acceptance — legitimate peer review typically takes weeks to months, not days
No recognizable editorial board or board members whose expertise does not match the journal's scope
Missing from major indexing databases like Scopus, Web of Science, or PubMed
Vague or absent peer review policies on the journal's website
Low-quality website with grammatical errors, broken links, or generic stock imagery
Broad scope covering unrelated disciplines (e.g., a single journal publishing on both quantum physics and medieval history)
Tools to verify:
Beall's List (maintained independently after its original takedown) tracks suspected predatory publishers
Cabell's Predatory Reports provides a curated database of journals flagged for predatory practices
DOAJ (Directory of Open Access Journals) lists vetted, legitimate open-access journals
Think. Check. Submit. is a checklist developed by a coalition of publishers to help researchers evaluate journals
If you are managing references for a team-based research project, having a system that flags or tags journal credibility saves significant time. ScholarDock lets you organize your reference library with custom tags and metadata, so you can mark sources as verified, flag questionable journals, and ensure every collaborator works from a trusted collection.
Common mistakes when checking peer review status
Even experienced researchers occasionally make errors when evaluating sources. Here are the most frequent mistakes and how to avoid them.
Assuming Google Scholar only indexes peer reviewed articles. Google Scholar is an excellent discovery tool, but it indexes preprints, theses, conference papers, government reports, and other non-peer-reviewed material alongside peer reviewed articles. Always verify the journal independently.
Confusing "published in a scholarly journal" with "peer reviewed." As mentioned earlier, not all content in a peer reviewed journal has been through the review process. Editorials, commentaries, and book reviews are typically exempt.
Relying on the article's appearance alone. Some predatory journals mimic the look and structure of legitimate publications. A professional-looking PDF with an abstract and references does not guarantee peer review. Cross-check the journal using Ulrichsweb or DOAJ.
Not checking the specific article type. Even in a peer reviewed journal, look for the article type designation. Original research articles, systematic reviews, and meta-analyses are peer reviewed. Letters, editorials, and errata usually are not.
Ignoring preprint versions. Preprints posted on servers like arXiv, bioRxiv, or SSRN have not been peer reviewed, even if the research is eventually published in a peer reviewed journal. Always cite the final published version when peer review is required.
How to organize and track your verified sources
Once you have confirmed that your sources are peer reviewed, the next challenge is keeping them organized — especially when you are working across multiple projects or collaborating with a team. Scattered PDFs, broken citation chains, and duplicated references are common pain points for research teams.
Here is a workflow that keeps your verified sources structured and accessible:
Create a centralized reference library. Store all your sources in one place rather than across multiple folders, email threads, and browser bookmarks.
Tag sources by review status. Use labels or metadata fields to mark sources as "peer reviewed," "preprint," "gray literature," or "trade publication." This makes filtering instant when you need to pull only verified sources for a manuscript.
Connect references to projects. Link each source to the specific project, chapter, or research question it supports. This prevents the common problem of rediscovering the same paper months later because you forgot where you saved it.
Track who added what. In collaborative projects, knowing which team member added a source — and whether it has been verified — prevents duplicated effort and ensures accountability.
Keep citation data current. DOIs, journal names, and publication dates should be accurate from the start. Cleaning up citations at the submission stage is far more painful than getting them right when you first save the source.
ScholarDock, a research project and reference management platform, is built for exactly this kind of workflow. You can import papers into a structured library, tag and annotate sources, connect references across projects, and collaborate with your team — all in one workspace. Instead of switching between a reference manager, a shared drive, and a project tracker, you get a single connected environment from literature search to published output.
Quick checklist: is your article peer reviewed?
Use this checklist when you need to quickly verify a source:
Did you find the article through an academic database with a peer review filter applied?
Does the journal's official website state that it uses peer review?
Is the journal listed as refereed in Ulrichsweb?
Does the article follow a structured format (abstract, methods, results, references)?
Are the authors affiliated with recognized research institutions?
Does the article include "Received," "Revised," and "Accepted" dates?
Is the journal indexed in Scopus, Web of Science, PubMed, or similar databases?
Is the journal free of predatory journal warning signs?
If you can check at least three or four of these boxes, the article is almost certainly peer reviewed. If you are unsure after going through the list, consult a reference librarian or check Ulrichsweb for definitive confirmation.
Build a research workflow you can trust
Knowing how to tell if an article is peer reviewed is a foundational skill for any researcher, whether you are an undergraduate writing your first term paper or a principal investigator managing a multi-site study. The methods outlined above — from database filters and Ulrichsweb lookups to examining article structure and spotting predatory journals — give you a reliable toolkit for verifying every source in your library.
The real challenge is not just identifying peer reviewed sources once, but maintaining a verified, organized collection as your research grows. If your team is tired of scattered PDFs, disconnected notes, and citation chaos, ScholarDock brings your entire research workflow — sources, projects, and collaborators — into one connected workspace. Start building a reference library you can trust from your very first search.