Recent article from the Chronicle of Higher Education about gaming the journal-rating system.
These are databases which specialize in in-depth coverage of a particular discipline or subject area, with an emphasis on scholarly and/or professional journal articles, although other types of materials are mentioned -- books, essays, reports and papers, dissertations and theses, Web sites, etc.
To see the list of these specialized databases,
There are differences in citation styles for articles used in research, depending on
See the "Articles" examples in Hacker's guide to APA Style, including both printed form and online form, but especially Articles from a database.
Important note about the last example: When stating "Retrieved from...," provide either
-- not the name of the journal.