Cita APA (7a ed.)

Poffenberger, A. (1942). Principles of applied psychology. D. Appleton-Century Company.

Cita Chicago Style (17a ed.)

Poffenberger, A.T. Principles of Applied Psychology. New York ; London: D. Appleton-Century Company, 1942.

Cita MLA (9a ed.)

Poffenberger, A.T. Principles of Applied Psychology. D. Appleton-Century Company, 1942.