Clark, M. M. (1989). Understanding research in early childhood education. Gordon and Breach.
Lua i Stíl Chicago (17ú heag.)Clark, Margaret Macdonald. Understanding Research in Early Childhood Education. New York: Gordon and Breach, 1989.
Lua MLA (9ú heag.)Clark, Margaret Macdonald. Understanding Research in Early Childhood Education. Gordon and Breach, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.