APA (7th ed.) Citation

Poffenberger, A. T. (1942). Principles of applied psychology. D. Appleton-Century company, incorporated.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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