APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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