APA relies on an author-date system, in which an abbreviated form of the author's name (last name and first initial) is followed by the date of publication. In APA, writers do not construct bibliographies, as they would in the Humanities, but compile lists of references made within the text. The APA style encourages the quick correlation of references made within the text with those found in the reference list itself. The APA style also gives writers an effective way to compile and summarize the research of others in their own writing.
The current method is set forth in the Publication Manual of the American Psychological Association, 6th ed. (2010).
Literature Review:
A literature review gives an overview of the field of inquiry: what has already been said on the topic, who the key writers are, what the prevailing theories and hypotheses are, what questions are being asked, and what methodologies and methods are appropriate and useful.
Critically-appraised individual articles evaluate and synopsize individual research studies.
Systematic Review:
A systematic review is a type of literature review that attempts to identify, appraise and synthesize all the empirical evidence that meets pre-specified eligibility criteria to answer a given research question. Researchers conducting systematic reviews use explicit methods aimed at minimizing bias, in order to produce more reliable findings that can be used to inform decision making.