APA (7th ed.) Citation

SOMMER. (1991). A practical guide to behavioral research: Tools and techniques (3rd.ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

SOMMER. A Practical Guide to Behavioral Research: Tools and Techniques. 3rd.ed. Oxford University Press, 1991.