Bell, R. R. (1968). Studies in marriage and the family. Crowell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBell, Robert R. Studies in Marriage and the Family. New York: Crowell, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBell, Robert R. Studies in Marriage and the Family. Crowell, 1968.
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