Cita APA (7a ed.)

Beck, A. T., & Alford, B. A. (2009). Depression: Causes and treatment (Second edition.). University of Pennsylvania Press.

Cita Chicago Style (17a ed.)

Beck, Aaron T., y Brad A. Alford. Depression: Causes and Treatment. Second edition. Philadelphia, Pennsylvania: University of Pennsylvania Press, 2009.

Cita MLA (8a ed.)

Beck, Aaron T., y Brad A. Alford. Depression: Causes and Treatment. Second edition. University of Pennsylvania Press, 2009.