ISENBERG, J. P., & JACOBS, J. E. (1982). Playthings as learning tools: A parents guide. John Wiley and Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रISENBERG, Joan P., और Judith E. JACOBS. Playthings as Learning Tools: A Parents Guide. New York: John Wiley and Sons, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रISENBERG, Joan P., और Judith E. JACOBS. Playthings as Learning Tools: A Parents Guide. John Wiley and Sons, 1982.
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