APA (7th ed.) Citation

Phillips, J. L. (1981). Piaget's theory, a primer. W. H. Freeman.

Chicago Style (17th ed.) Citation

Phillips, John L. Piaget's Theory, a Primer. San Francisco: W. H. Freeman, 1981.

MLA (9th ed.) Citation

Phillips, John L. Piaget's Theory, a Primer. W. H. Freeman, 1981.