Cita APA (7th ed.)

American Psychological Association & APA. (2010). Publication manual (6a. ed.). APA.

Cita Chicago (17th ed.)

American Psychological Association i APA. Publication Manual. 6a. ed. Washington, D.C: APA, 2010.

Cita MLA (9th ed.)

American Psychological Association i APA. Publication Manual. 6a. ed. APA, 2010.