APA style guidelines require a reference list of all the sources you included in your research paper. APA references follow the author-date style of citation. You may be asked to create an annotated APA bibliography, however. This could be a separate assignment or part of the larger research project. This goes above and beyond the basic reference list with a brief discussion of each entry...
APA Style is developed by the American Psychological Association (APA) for research in education, social and behavioral sciences. APA citation format rules are laid out in the Publication Manual of the American Psychological Association and are available online as well. Currently, the sixth edition is in place; however, APA is releasing the seventh edition soon. APA uses the author-date style with in-text citations and corresponding reference list entries.
Source:
VandenBos, G. R. (Ed). (2010). Publication manual of the American Psychological Association (6th ed.). Washington, DC: American Psychological Association