Babbie, E. R. (2017). The Basics of social research (Seventh edition.). Cengage Learning.
Dyfyniad Arddull ChicagoBabbie, Earl R. The Basics of Social Research. Seventh edition. Boston, Massachusetts: Cengage Learning, 2017.
Dyfyniad MLABabbie, Earl R. The Basics of Social Research. Seventh edition. Cengage Learning, 2017.
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