APA (7th ed.) Citation

Pennington, L. A., & Berg, I. A. (1954). An introduction to clinical psychology (2d ed.). Ronald Press Co..

Chicago Style (17th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. 2d ed. New York: Ronald Press Co., 1954.

MLA (9th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. 2d ed. Ronald Press Co., 1954.