Hill, W. F. (1997). Learning: A survey of psychological interpretations (6th ed.). Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHill, Winfred F. Learning: A Survey of Psychological Interpretations. 6th ed. New York: Longman, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHill, Winfred F. Learning: A Survey of Psychological Interpretations. 6th ed. Longman, 1997.
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