Não informado. (1969). International Journal of Early Childhood. World Organization for Early Childwood Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. International Journal of Early Childhood. Dublin: World Organization for Early Childwood Education, 1969.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. International Journal of Early Childhood. World Organization for Early Childwood Education, 1969.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.