APA (7th ed.) Zitazioa
Beck, A. T., & Alford, B. A. (2009). Depression: Causes and treatment (Second edition.). University of Pennsylvania Press.
Chicago Style (17th ed.) Zitazioa
Beck, Aaron T., eta Brad A. Alford. Depression: Causes and Treatment. Second edition. Philadelphia, Pennsylvania: University of Pennsylvania Press, 2009.
MLA (9th ed.) Zitazioa
Beck, Aaron T., eta Brad A. Alford. Depression: Causes and Treatment. Second edition. University of Pennsylvania Press, 2009.
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