APA (7th ed.) Citation

Phillips, J. L. (1969). The origins of intellect: Piaget's theory (2.ed.). Freeman.

Chicago Style (17th ed.) Citation

Phillips, John L. The Origins of Intellect: Piaget's Theory. 2.ed. San Francisco: Freeman, 1969.

MLA (9th ed.) Citation

Phillips, John L. The Origins of Intellect: Piaget's Theory. 2.ed. Freeman, 1969.