APA (7th ed.) Citation

Piaget, J. (1952). The child's conception of number. Routledge & Paul.

Chicago Style (17th ed.) Citation

Piaget, Jean. The Child's Conception of Number. London: Routledge & Paul, 1952.

MLA (8th ed.) Citation

Piaget, Jean. The Child's Conception of Number. Routledge & Paul, 1952.