American, P. A. (2011). Publication Manual of the american psycological association. APA.
Cita Chicago (17th ed.)American, Psychological Association. Publication Manual of the American Psycological Association. APA, 2011.
Cita MLA (9th ed.)American, Psychological Association. Publication Manual of the American Psycological Association. APA, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.