Hurlock, E. B. (1956). Child development. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Hurlock, Elizabeth Bergner. Child Development. New York: McGraw-Hill, 1956.
Lua MLA (9ú heag.)Hurlock, Elizabeth Bergner. Child Development. McGraw-Hill, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.