Steinberg, Laurence
Development : infancy through adolescence
Wadsworth and Cengage Learning, 2011
Buku Teks SO
Fogel, Alan
Infancy
West Publishing, 1984
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Adamson, Lauren
Communication development during infancy / Lauren B. Adamson.
Westview Press, 1996
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Pipes, Peggy L.
Nutrition in infancy and childhood
Tinus Mirror/Mosby , 1989
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Lovell, K.
An Introduction to human development
Macmillan, 1968
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