APA (7th ed.) Citation

Sommer, B. B., & Sommer, R. (1991). A practical guide to behavioral research: Tools and techniques (3rd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Sommer, Barbara Baker, and Robert Sommer. A Practical Guide to Behavioral Research: Tools and Techniques. 3rd ed. New York: Oxford University Press, 1991.

MLA (9th ed.) Citation

Sommer, Barbara Baker, and Robert Sommer. A Practical Guide to Behavioral Research: Tools and Techniques. 3rd ed. Oxford University Press, 1991.