APA (7th ed.) Citation

Commins, W. D., & Fagin, B. (1954). Principles of educational psychology (2d ed.). Ronald Press.

Chicago Style (17th ed.) Citation

Commins, W. D., and Barry Fagin. Principles of Educational Psychology. 2d ed. New York: Ronald Press, 1954.

MLA (9th ed.) Citation

Commins, W. D., and Barry Fagin. Principles of Educational Psychology. 2d ed. Ronald Press, 1954.