APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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