APA (7th ed.) Citation

Hollingworth, H. L., & Poffenberger, A. T. (1920). Applied psychology. Appleton.

Chicago Style (17th ed.) Citation

Hollingworth, Harry L., and Albert T. Poffenberger. Applied Psychology. New York u.a: Appleton, 1920.

MLA (9th ed.) Citation

Hollingworth, Harry L., and Albert T. Poffenberger. Applied Psychology. Appleton, 1920.