Wagenaar, T. C., & Babbie, E. (1989). Practicing social research (5th ed.). Wadsworth.
Chicago Style (17. basım) AtıfWagenaar, Theodore C., ve Earl Babbie. Practicing Social Research. 5th ed. California: Wadsworth, 1989.
MLA (9th ed.) AtıfWagenaar, Theodore C., ve Earl Babbie. Practicing Social Research. 5th ed. Wadsworth, 1989.
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