Cita APA (7a ed.)

Barnard, R. (1994). Depression - The Evolution of Powerlessness, by P. Gilbert. British journal of clinical psychology, 33(1), 122-123.

Cita Chicago Style (17a ed.)

Barnard, R. "Depression - The Evolution of Powerlessness, by P. Gilbert." British Journal of Clinical Psychology 33, no. 1 (1994): 122-123.

Cita MLA (8a ed.)

Barnard, R. "Depression - The Evolution of Powerlessness, by P. Gilbert." British Journal of Clinical Psychology, vol. 33, no. 1, 1994, pp. 122-123.