How can I tell if a journal article is peer-reviewed?
Articles that are peer reviewed (also called scholarly or refereed) can be distinguished from popular, non-academic sources by looking for certain features such as abstracts, bibliographies, and the absence of advertisements.
See scholarly or popular sources for a full description. To verify for sure that an article is scholarly, use Ulrich's Periodicals Directory. Ulrich's will tell you whether a journal title is peer reviewed.