Baldwin, A. L. (1967). Theories of child development. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Baldwin, Alfred L. Theories of Child Development. New York: John Wiley & Sons, 1967.
Lua MLA (9ú heag.)Baldwin, Alfred L. Theories of Child Development. John Wiley & Sons, 1967.
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