Clemson, D., & Clemson, W. (1994). Mathematics in the early years. Routledge.
Čikaški stil citiranja (17. izdanje)Clemson, David, i Wendy Clemson. Mathematics in the Early Years. London ; New York: Routledge, 1994.
MLA način citiranja (9. izdanje)Clemson, David, i Wendy Clemson. Mathematics in the Early Years. Routledge, 1994.
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