APA (7th ed.) Citation

Perrin, F. A. C., & Klein, D. B. 1. . . .. (1926). Psychology: Its methods and principles. H. Holt and Co.

Chicago Style (17th ed.) Citation

Perrin, Fleming Allen Clay, and David Ballin 1897- Klein. Psychology: Its Methods and Principles. New York: H. Holt and Co, 1926.

MLA (9th ed.) Citation

Perrin, Fleming Allen Clay, and David Ballin 1897- Klein. Psychology: Its Methods and Principles. H. Holt and Co, 1926.