Piaget, J. (1963). The origins of intelligence in children. New York: W. W. Norton & Company.
Παραπομπή Chicago StylePiaget, Jean. The Origins of Intelligence in Children. New York: W. W. Norton & Company, 1963.
Παραπομπή MLAPiaget, Jean. The Origins of Intelligence in Children. New York: W. W. Norton & Company, 1963.
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