Cita APA (7th ed.)
Morris, C. G. (1988). Psychology: An introduction (6th ed.). Prentice - hall.
Cita Chicago (17th ed.)
Morris, Charles G. Psychology: An Introduction. 6th ed. New Jersey: Prentice - hall, 1988.
Cita MLA (9th ed.)
Morris, Charles G. Psychology: An Introduction. 6th ed. Prentice - hall, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.