APA (7th ed.) Citation

Sommer, R., & Sommer, B. B. (2002). A practical guide to behavioral research: Tools and techniques (Fifth edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Sommer, Robert, and Barbara Baker Sommer. A Practical Guide to Behavioral Research: Tools and Techniques. Fifth edition. New York: Oxford University Press, 2002.

MLA (9th ed.) Citation

Sommer, Robert, and Barbara Baker Sommer. A Practical Guide to Behavioral Research: Tools and Techniques. Fifth edition. Oxford University Press, 2002.