One way to do this is via using Ulrich's Periodicals Directory to determine whether or not a publication is peer-reviewed, which is also referred to as "refereed" in some circles. The gallery below this box will guide you, step-by-step, in determining whether or not a publication is peer-reviewed using Ulrich's.
Please note that some journals may claim to be peer-reviewed but do not actually undergo an extensive peer-review process, or there may be other factors that call into question the legitimacy of their reviews. Refereed status in Ulrich's can help you determine if a journal is peer-reviewed credibly or not.