National Society for the Study of Education. Committee on Early Childhood Education & Gordon, I. J. (1972). Early childhood education. NSSE; distributed by the University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Society for the Study of Education. Committee on Early Childhood Education और Ira J. Gordon. Early Childhood Education. Chicago: NSSE; distributed by the University of Chicago Press, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Society for the Study of Education. Committee on Early Childhood Education और Ira J. Gordon. Early Childhood Education. NSSE; distributed by the University of Chicago Press, 1972.
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