Babbie, E. R. (2001). The practice of social research (9th ed.). Wadsworth Thomson Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBabbie, Earl R. The Practice of Social Research. 9th ed. Belmont, Calif: Wadsworth Thomson Learning, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBabbie, Earl R. The Practice of Social Research. 9th ed. Wadsworth Thomson Learning, 2001.
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