Babbie, E. (1989). The practice of social research (5th.ed.). Wadsworth.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBabbie, Earl. The Practice of Social Research. 5th.ed. Belmont: Wadsworth, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBabbie, Earl. The Practice of Social Research. 5th.ed. Wadsworth, 1989.
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