Dyfyniad APA

Levin, J., & Fox, J. A. (1994). Elementary statistics in social research (6th ed.). HarperCollins College.

Dyfyniad Arddull Chicago

Levin, Jack, and James Alan Fox. Elementary Statistics in Social Research. 6th ed. New York: HarperCollins College, 1994.

Dyfyniad MLA

Levin, Jack, and James Alan Fox. Elementary Statistics in Social Research. 6th ed. HarperCollins College, 1994.

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