APA (7th ed.) Citation

Pennington, L. A., & Berg, I. A. (1966). An introduction to clinical psychology (3d ed.). Ronald Press Co..

Chicago Style (17th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. 3d ed. New York: Ronald Press Co., 1966.

MLA (9th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. 3d ed. Ronald Press Co., 1966.