Citazione Stile APA (7a Edizione)

Sommer, R. (1997). A practical guide to behavioral research: Tools and techniques (4th ed.). OUP.

Citazione stile Chigago Style (17a edizione)

Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 4th ed. New York: OUP, 1997.

Citatione MLA (9a ed.)

Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 4th ed. OUP, 1997.