APA aipamena

John L. Phillips. (1969). The origins of intellect: Piaget's theory. San Francisco: W.H. Freeman and Co.

Chicago Style aipamena

John L. Phillips. The Origins of Intellect: Piaget's Theory. San Francisco: W.H. Freeman and Co, 1969.

MLA aipamena

John L. Phillips. The Origins of Intellect: Piaget's Theory. San Francisco: W.H. Freeman and Co, 1969.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.