APA (7th ed.) Citation

Piaget, J., & Wells, P. A. (1972). Psychology and epistemology: Towards a theory of knowledge. Penguin Press.

Chicago Style (17th ed.) Citation

Piaget, Jean, and P. A. Wells. Psychology and Epistemology: Towards a Theory of Knowledge. Allen Lane: Penguin Press, 1972.

MLA (8th ed.) Citation

Piaget, Jean, and P. A. Wells. Psychology and Epistemology: Towards a Theory of Knowledge. Penguin Press, 1972.

Warning: These citations may not always be 100% accurate.