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Many academic journals incorporate a "peer review" or "referee" process in which other experts in the subject area examine
journal articles before they are accepted for publication. A journal’s
review board can send a paper back to the author with
suggestions for improvement, which the author must make if the article
is to be published.
Peer review makes it much more likely that the research described in a
journal's articles is sound and of high quality. Note that "scholarly” and “peer-reviewed” are related but not the same: not
all scholarly sources are necessarily peer-reviewed, but most
peer-reviewed articles would be considered scholarly.
Peer Review in 3 Minutes
Youtube Video - Peer Review in 3 Minutes
Anatomy of a Scholarly Article
Informative Picture - Anatomy of a Scholarly Article