Kagan, J., & Havemann, E. (1976). Psychology: An introduction (3d ed.). Harcourt Brace Jovanovich.

Kagan, Jerome, and Ernest Havemann. Psychology: An Introduction. 3d ed. New York: Harcourt Brace Jovanovich, 1976.

Kagan, Jerome, and Ernest Havemann. Psychology: An Introduction. 3d ed. Harcourt Brace Jovanovich, 1976.