Cita APA (7th ed.)

Feldman, R. S. (2009). Understanding psychology (9th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Feldman, Robert S. Understanding Psychology. 9th ed. New York: McGraw-Hill, 2009.

Cita MLA (8th ed.)

Feldman, Robert S. Understanding Psychology. 9th ed. McGraw-Hill, 2009.