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.
Chicago-viite (17. p.)National Society for the Study of Education. Committee on Early Childhood Education ja Ira J. Gordon. Early Childhood Education. Chicago: NSSE; distributed by the University of Chicago Press, 1972.
MLA-viite (8. p.)National Society for the Study of Education. Committee on Early Childhood Education ja Ira J. Gordon. Early Childhood Education. NSSE; distributed by the University of Chicago Press, 1972.
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