APA (7 वां संस्करण) प्रशस्ति पत्र

Não informado. (1969). International Journal of Early Childhood. World Organization for Early Childwood Education.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Não informado. International Journal of Early Childhood. Dublin: World Organization for Early Childwood Education, 1969.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Não informado. International Journal of Early Childhood. World Organization for Early Childwood Education, 1969.

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