Periodical” is the term given to publications that are published regularly (daily, weekly, monthly, quarterly, etc.) for an extended period of time. For many research assignments, your professors will require that you use articles from scholarly journals instead of popular magazines or trade publications. These pages (see Related Pages in left sidebar)  describe how to distinguish scholarly journals (sometimes called “peer-reviewed” or “refereed” journals) from other types of periodicals.

There are some periodicals which don’t fall clearly into any one category. You will need to use your judgment—and the clues from these pages—to determine which kind of publication or article you are dealing with.

How to use these pages: Start by viewing the three-minute video on the right. Then look at information on each of these types of periodical:


Comparison of Scholarly and Popular Periodicals (PDF)