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.

National Society for the Study of Education. Committee on Early Childhood Education and Ira J. Gordon. Early Childhood Education. Chicago: NSSE; distributed by the University of Chicago Press, 1972.

National Society for the Study of Education. Committee on Early Childhood Education and Ira J. Gordon. Early Childhood Education. NSSE; distributed by the University of Chicago Press, 1972.