You can determine if a journal is peer-reviewed by looking for several indications. Peer-reviewed journals are published by professional associations or academic institutions and will often include the description "scholarly" or "peer-reviewed" in the publication information. Scholarly articles usually include an abstract, footnotes or citations of sources, and bibliographies or reference lists.
One of the simplest ways to identify peer-reviewed journals is to conduct a search in one of the library's article databases, such as Academic Search Complete (link below). These databases allow limiting results to only peer-reviewed journals:
You can review the characteristics and purpose of scholarly journals from the Information Sources guide linked below.