Tohutoro APA (7th ed.)
Sommer, R. (2002). A practical guide to behavioral research: Tools and techniques (5th ed.). OUP.
Tohutoru Kātū Chicago (17th ed.)
Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 5th ed. New York: OUP, 2002.
Tohutoro MLA (9th ed.)
Sommer, Robert. A Practical Guide to Behavioral Research: Tools and Techniques. 5th ed. OUP, 2002.
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