Franklin

MLA

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

APA

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

Chicago

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