Não informado. (1971). Early Child Development and Care. Gordon and Breach Science Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Early Child Development and Care. London: Gordon and Breach Science Publishers, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Early Child Development and Care. Gordon and Breach Science Publishers, 1971.
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