How to Find Scholarly Sources (Free Databases and Search Tricks)

A scholarly source is written by experts for other experts and reports research or analysis, usually in an academic journal or book. Cornell University Library describes scholarly or peer-reviewed journal articles as written by scholars or professionals who are experts in their fields (Cornell University Library). Here is how to find them without wasting an evening.

What are the steps to find scholarly sources?

Where can you find scholarly sources for free?

Every database below is free to search. Full text is a different matter: some give you the whole article, some only the citation and abstract. Facts in the table come from each service's own website.

The last row matters most. A library database search usually turns up fewer irrelevant hits than a web search, and the full text is often one click away.

How do you search Google Scholar effectively?

Google Scholar's own help page explains the features worth knowing (Google Scholar Search Help):

• Exact titles and phrases: put them in quotation marks, for example "sleep duration".
• Author: use the author: operator, for example author:"j smith".
• Recent work: results are sorted by relevance; click Since Year in the sidebar for recent papers, or Sort by date for the newest.
• Going deeper or broader: if results are too specific, look at what they cite in their references; if too basic, click Cited by to see newer papers that cite them.
• Full text: if you are affiliated with a university but don't see links to your library next to results, ask your library how to connect its subscriptions.

Which search strings work best?

Databases and search engines share a few operators. Combine them to cut thousands of results down to a few dozen.

UC Santa Barbara's library lists Boolean searching (AND, OR, NOT) among the most common advanced-search features in databases and library catalogs (UCSB Library). Google documents the quotes, site:, minus, before:/after: and filetype: operators in its search help (Google Search Help). A site:.edu search finds university pages, which are not automatically scholarly: a class syllabus on a .edu site is still not a peer-reviewed source.

How can you tell if a source is peer-reviewed?

Not every scholarly journal is peer-reviewed, as the University of Texas at Dallas library points out; for a quick confirmation it recommends Ulrichsweb, a periodicals directory that marks peer-reviewed journals as "refereed" (UT Dallas Libraries). Ask your library whether it subscribes. Until then, this checklist catches most problems:

1. Where was it published? An academic journal or a university or scholarly press, not a magazine, newspaper or blog.
2. Who wrote it? Named authors with a university or research affiliation.
3. Does it look like research? An abstract, a method or argument section and a reference list.
4. Does the journal describe its review process? The journal's website usually has a page for authors that explains peer review.
5. Did the database flag it? Many databases, including ERIC, offer a peer-reviewed-only filter.

If a source passes all five, it is very likely scholarly. If it fails the first two, it is very likely not, however professional it looks.

How do you get past a paywall legally?

You rarely need to pay for an article as a student. Try these in order:

• Your library's full-text link. Start your search from the library website, or connect Google Scholar to your library, so links appear next to results.
• Interlibrary loan. If your library doesn't own something, it can usually borrow it. At the University of Texas at Austin, for example, interlibrary loan is a free service for current students, faculty and staff, covering books, articles and chapters (UT Libraries). Check your own library's terms.
• Open-access versions. The Unpaywall browser extension shows a tab when a free, legal copy exists; its site describes it as fast, free and legal (Unpaywall). In Google Scholar, also check All versions under a result.
• JSTOR's free reads. With a free personal account you can read up to 10 articles online every 30 days, though publishers exclude some articles (JSTOR Support).
• Ask the author. Many researchers share a copy of their paper by email when asked politely.

What mistakes waste the most search time?

• Searching your whole question as a sentence. Databases match words, not meaning. "How does sleep affect grades in college" returns noise; "sleep duration" AND "academic performance" AND undergraduates returns studies.
• Stopping at the first page of results. Sort or filter instead: by date, by peer review, by subject heading.
• Ignoring the database's own vocabulary. When a result fits perfectly, look at its subject terms or keywords and reuse them in your next search.
• Reading full papers too early. Skim the abstract and conclusion first, and read in full only the sources that clearly answer your question.
• Not saving as you go. Losing a good source you found an hour ago is the most common time sink of all. Save the citation, the DOI and a one-line note the moment you decide to keep something.

How many sources should you look for?

Plan to find more than you will cite, then keep the strongest. The rule of thumb and a table by page count are in how many sources for a research paper. Make sure the mix matches the assignment, including firsthand evidence when it asks for it (primary vs secondary sources). Once you have a stack, the next step is to read across them, which is what a literature review is for.