Dooley,David. (2007). Social Research Methods (4th ed.). Prentice-hall.
Chicago Stili AlıntıDooley,David. Social Research Methods. 4th ed. New Delhi: Prentice-hall, 2007.
MLA AlıntıDooley,David. Social Research Methods. 4th ed. Prentice-hall, 2007.
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