APA (7th ed.) Citation

Pennington, L. A., & Berg, I. A. (1948). An introduction to clinical psychology. Ronald Press Company.

Chicago Style (17th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. New York: Ronald Press Company, 1948.

MLA (9th ed.) Citation

Pennington, L. A., and Irwin A. Berg. An Introduction to Clinical Psychology. Ronald Press Company, 1948.