Cita APA (7a ed.)

Clemson, D., & Clemson, W. (1994). Mathematics in the early years. Routledge.

Cita Chicago Style (17a ed.)

Clemson, David, y Wendy Clemson. Mathematics in the Early Years. London: Routledge, 1994.

Cita MLA (9a ed.)

Clemson, David, y Wendy Clemson. Mathematics in the Early Years. Routledge, 1994.