Cita APA (7th ed.)

Zimbardo, P. G. (1975). Psychology of life (9th.ed.). Scott,Foresman and co..

Cita Chicago (17th ed.)

Zimbardo, Philip G. Psychology of Life. 9th.ed. Illinois: Scott,Foresman and co., 1975.

Cita MLA (9th ed.)

Zimbardo, Philip G. Psychology of Life. 9th.ed. Scott,Foresman and co., 1975.