Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.