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 ; New York: Routledge, 1994.
Cita MLA (9a ed.)
Clemson, David, y Wendy Clemson. Mathematics in the Early Years. Routledge, 1994.
Precaución: Estas citas no son 100% exactas.