Não informado. (1967). Early Childhood Education. Alberta Teachers Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Early Childhood Education. Edmonton, Canada: Alberta Teachers Association, 1967.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Early Childhood Education. Alberta Teachers Association, 1967.
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