Spencer, T. D., & Kass, N. (1970). Perspectives in child psychology: Research and review. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpencer, Thomas D., और Norman Kass. Perspectives in Child Psychology: Research and Review. New York: McGraw-Hill, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpencer, Thomas D., और Norman Kass. Perspectives in Child Psychology: Research and Review. McGraw-Hill, 1970.
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