A scholarly journal that uses the peer review process before publishing articles is described as a refereed journal.
An article that has undergone scrutiny of other scholars and researchers is described as a peer-reviewed article.
Many databases provide a search limiter that help you eliminate publications such as magazines, newspapers, and trade journals. Look for a limiter option such as this:
When searching for articles using Google Scholar, however, you need to ascertain that a journal is refereed. Use the tools on this page, such as Ulrichsweb to help you identify this information.
Detailed information on hundreds of thousands of periodicals: academic/scholarly/peer-reviewed journals, e-journals, popular magazines, newspapers, newsletters, and more.
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Ulrichsweb: How can I identify whether a journal is peer-reviewed? Search for a magazine or journal by title. If it is identified with a referee shirt, it is a refereed publication, and most articles in the publication will be peer reviewed.