Cita APA (7a ed.)

Evans, R. I., Piaget, J., & Duckworth, E. R. (1973). Jean Piaget: The man and his ideas. E.P. Dutton & Co., Inc.

Cita Chicago Style (17a ed.)

Evans, Richard I., Jean Piaget, y Eleanor Ruth Duckworth. Jean Piaget: The Man and His Ideas. New York: E.P. Dutton & Co., Inc, 1973.

Cita MLA (9a ed.)

Evans, Richard I., et al. Jean Piaget: The Man and His Ideas. E.P. Dutton & Co., Inc, 1973.