APA (7th ed.) Citation

Piaget, J., & Duckworth, E. (1970). Genetic epistemology. Columbia University Press.

Chicago Style (17th ed.) Citation

Piaget, Jean, and Eleanor Duckworth. Genetic Epistemology. New York: Columbia University Press, 1970.

MLA (9th ed.) Citation

Piaget, Jean, and Eleanor Duckworth. Genetic Epistemology. Columbia University Press, 1970.