Παραπομπή APA

Gesell, A. Child Development: An introduction to the study of human growth. New York: Harper & Brothers.

Παραπομπή Chicago Style

Gesell, Arnold. Child Development: An Introduction to the Study of Human Growth. New York: Harper & Brothers.

Παραπομπή MLA

Gesell, Arnold. Child Development: An Introduction to the Study of Human Growth. New York: Harper & Brothers.

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