HESS, R. D., & CROFT, D. J. (1972). Teachers of young childreen.-- ed.2. Hougton Mifflin.
Lua i Stíl Chicago (17ú heag.)HESS, Robert D., agus Doreen J. CROFT. Teachers of Young Childreen.-- Ed.2. Boston: Hougton Mifflin, 1972.
Lua MLA (9ú heag.)HESS, Robert D., agus Doreen J. CROFT. Teachers of Young Childreen.-- Ed.2. Hougton Mifflin, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.