Copeland, R. W. (1974). Diagnostic and learning activities in mathematics for children. Macmillan.
Čikaški stil citiranja (17. izdanje)Copeland, Richard W. Diagnostic and Learning Activities in Mathematics for Children. New York: Macmillan, 1974.
MLA način citiranja (9. izdanje)Copeland, Richard W. Diagnostic and Learning Activities in Mathematics for Children. Macmillan, 1974.
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