Não informado. (1967). Early Childhood Education. Alberta Teachers Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Early Childhood Education. Edmonton, Canada: Alberta Teachers Association, 1967.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Early Childhood Education. Alberta Teachers Association, 1967.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.