APA Citation

Piaget, J., Gruber, H. E., & Voneche, J. J. (1977). The essential Piaget. London: Routledge & Kegan Paul.

Chicago Style Citation

Piaget, Jean, Howard E. Gruber, and J. Jacques Voneche. The Essential Piaget. London: Routledge & Kegan Paul, 1977.

MLA Citation

Piaget, Jean, Howard E. Gruber, and J. Jacques Voneche. The Essential Piaget. London: Routledge & Kegan Paul, 1977.

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