Dyfyniad APA

Zikmund, W. G. (1984). Business research methods (4th ed.). Dryden press.

Dyfyniad Arddull Chicago

Zikmund, William G. Business Research Methods. 4th ed. New York: Dryden press, 1984.

Dyfyniad MLA

Zikmund, William G. Business Research Methods. 4th ed. Dryden press, 1984.

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