Note: not every article published in a peer-reviewed journal is a peer-reviewed article.
How Can I Tell if an Article is Peer-reviewed?
Look at the article and check for the following:
--is the article published in a journal affiliated with a university or professional scholarly society or association?
--is the topic discussed in-depth with a narrow focus?
--is the author reporting on his/her original research?
--is the author an expert in the field? Look for credentials and an affiliation with a research institute or university.
A new feature in the library catalog helps to identify peer review quickly with an indicator on the library search results page.

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What if I have an article that didn't come from a database search, like Google, or from a list of references? How can I find out if it's peer-reviewed?
Use Ulrich's Web database to see if the journal is peer-reviewed. Enter the journal name into the search box. Look for the referee symbol to the left of the journal title. This indicates that the journal is "refereed" or peer-reviewed.