Não informado. (1971). Early Child Development and Care. Gordon and Breach Science Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Early Child Development and Care. London: Gordon and Breach Science Publishers, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Early Child Development and Care. Gordon and Breach Science Publishers, 1971.
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