Babbie, E. R. (2008). The practice of social research (4th edition.). Belmont, CA: Thomson/Wadsworth.
Chicago Stili AlıntıBabbie, Earl R. The Practice of Social Research. 4th edition. Belmont, CA: Thomson/Wadsworth, 2008.
MLA AlıntıBabbie, Earl R. The Practice of Social Research. 4th edition. Belmont, CA: Thomson/Wadsworth, 2008.
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