Peer review is a process in which other scholars in the author's field or specialty critically assess a draft of the article. Peer reviewed, or refereed, journals are scholarly journals that only publish articles that have gone through this review process.
A scholarly journal is visibly different from other periodicals/magazines, but sometimes it's hard to tell. You can use Ulrichsweb Global Serials Directory to check.
How to evaluate information sources
Use the criteria below to help you evaluate the information you find to determine if it is appropriate for your research. Remember that different criteria will be more or less important depending on the topic or purpose of your research.
Currency: The timeliness of the information.
Relevance: The importance of the information for your needs.
Authority: The source of the information.
Accuracy: The reliability, truthfulness and correctness of the content.
Purpose: The reason the information exists.
The CRAAP evaluation criteria were originally developed at Meriam Library at CSU Chico.