Hillman, C. B. (1988). Teaching four year olds: A personal Journey. Phi Delta Kappa Educational Foundation.
Chicago-referens (17:e uppl.)Hillman, Carol B. Teaching Four Year Olds: A Personal Journey. USA: Phi Delta Kappa Educational Foundation, 1988.
MLA-referens (9:e uppl.)Hillman, Carol B. Teaching Four Year Olds: A Personal Journey. Phi Delta Kappa Educational Foundation, 1988.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.