Hurlock, E. B. (1956). Child development (3a. ed.). McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)Hurlock, Elizabeth B. Child Development. 3a. ed. Nueva York: McGraw-Hill, 1956.
Tohutoro MLA (9th ed.)Hurlock, Elizabeth B. Child Development. 3a. ed. McGraw-Hill, 1956.
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