APA (7th ed.) Citation

Gatchel, R. J., & Baum, A. (1989). An introduction to health psychology (2. ed.). Random House.

Chicago Style (17th ed.) Citation

Gatchel, Robert J., and Andrew Baum. An Introduction to Health Psychology. 2. ed. New York: Random House, 1989.

MLA (9th ed.) Citation

Gatchel, Robert J., and Andrew Baum. An Introduction to Health Psychology. 2. ed. Random House, 1989.