Não informado. (1967). Early Childhood Education. Alberta Teachers Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Early Childhood Education. Edmonton, Canada: Alberta Teachers Association, 1967.
MLA-Zitierstil (8. Ausg.)Não informado. Early Childhood Education. Alberta Teachers Association, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.