APA (7th ed.) Zitazioa

Beck, A. T. (1979). Cognitive therapy of depression. Guilford Press.

Chicago Style (17th ed.) Zitazioa

Beck, Aaron T. Cognitive Therapy of Depression. New York: Guilford Press, 1979.

MLA (9th ed.) Zitazioa

Beck, Aaron T. Cognitive Therapy of Depression. Guilford Press, 1979.