APA (7th ed.) Citation

Hull, C. L. (1943). Principles of behavior: An introduction to behavior theory. D. Appleton-Century Co.

Chicago Style (17th ed.) Citation

Hull, Clark Leonard. Principles of Behavior: An Introduction to Behavior Theory. New York: D. Appleton-Century Co, 1943.

MLA (9th ed.) Citation

Hull, Clark Leonard. Principles of Behavior: An Introduction to Behavior Theory. D. Appleton-Century Co, 1943.