Não informado. (1969). International Journal of Early Childhood. World Organization for Early Childwood Education.
Chicago-viite (17. p.)Não informado. International Journal of Early Childhood. Dublin: World Organization for Early Childwood Education, 1969.
MLA-viite (8. p.)Não informado. International Journal of Early Childhood. World Organization for Early Childwood Education, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.