Não informado. (1969). International Journal of Early Childhood. World Organization for Early Childwood Education.
Style de citation Chicago (17e éd.)Não informado. International Journal of Early Childhood. Dublin: World Organization for Early Childwood Education, 1969.
Style de citation MLA (8e éd.)Não informado. International Journal of Early Childhood. World Organization for Early Childwood Education, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.