Peer-reviewed publications (sometimes referred to as scholarly, academic, or refereed) have gone through a review process by experts in the field before being published. These strategies can help you determine if an article is peer-reviewed.
1. If you found the article in a library database, there may be some indicators of whether the article is scholarly. Most publications in "Academic Journals" have been peer reviewed.
Note, however, that some articles in peer-reviewed journals may not actually be peer-reviewed: editorials, news items, and book reviews do not necessarily go through the same review process. A peer-reviewed article should be longer than just a couple of pages and should include a bibliography.
2. In many library databases, the journal title may be linked, as shown below. Clicking on it takes you to a page that may indicate whether the journal is scholarly, academic, peer-reviewed, or refereed.
3. The publisher's website for the journal should also indicate whether articles go through a peer review process. Find a page like "For Authors" to locate this information.