APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.