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.
Lua i Stíl Chicago (17ú heag.)National Society for the Study of Education. Committee on Early Childhood Education agus Ira J. Gordon. Early Childhood Education. Chicago: NSSE; distributed by the University of Chicago Press, 1972.
Lua MLA (8ú heag.)National Society for the Study of Education. Committee on Early Childhood Education agus Ira J. Gordon. Early Childhood Education. NSSE; distributed by the University of Chicago Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.