How do I know if a journal article is peer-reviewed?
Determining whether an article is peer-reviewed or not can be handled in a number of different ways.
a). Many of our databases offer a limiter to "peer-reviewed articles." Find your article in the database and apply this limiter to it. If the article "disappears" after the limiter was set, then it was not peer-reviewed. (This should work well in most cases, though from time to time librarians have suspicions about how the databases are defining "peer-reviewed").
b). Most journals now have their own homepage. Do a search in Google and locate the journal's website. Look for a section on author's instructions or perhaps "about the journal." Peer-reviewed journals are proud of their prestige and should let you know about. And, if you are thinking of submitting to the journal, the author's instructions tell you what steps are needed, including whether or not it will be reviewed.
Remember, peer-reviewed and juried are synonyms for the same process.
c). You could also look up the entry for the journal in Ulrichsweb: Global Serial Directory. Ulrichsweb lists all currently published journals and does tell whether or not a journal is peer-reviewed.