Cozby, P. C. (1989). Methods in behavioral research (4th ed.). Mayfield.
Tohutoru Kātū Chicago (17th ed.)Cozby, Paul C. Methods in Behavioral Research. 4th ed. California: Mayfield, 1989.
Tohutoro MLA (9th ed.)Cozby, Paul C. Methods in Behavioral Research. 4th ed. Mayfield, 1989.
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