If you search a database and the full article's not there, don't despair. Look for the "FindIt" button: or FindIt@BC. Find It will offer help including:
Web of Science & Biosis Previews
If the title of the journal is "refereed," it is a peer-reviewed journal.
Both Biological Sciences & PsycInfo have a check box that allows you to limit your search to peer-reviewed journal articles.