Stern, C. (1949). Children discover arithmetic: An introduction to structural arithmetic. Harper.
Čikaški stil citiranja (17. izdanje)Stern, Catherine. Children Discover Arithmetic: An Introduction to Structural Arithmetic. New York: Harper, 1949.
MLA način citiranja (9. izdanje)Stern, Catherine. Children Discover Arithmetic: An Introduction to Structural Arithmetic. Harper, 1949.
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