Cita APA (7th ed.)
Morris, C. G. (1990). Psychology: An introduction (7th ed.). Prentice Hall.
Cita Chicago (17th ed.)
Morris, Charles G. Psychology: An Introduction. 7th ed. New Jersey: Prentice Hall, 1990.
Cita MLA (9th ed.)
Morris, Charles G. Psychology: An Introduction. 7th ed. Prentice Hall, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.