Beckmann, S. (2008). Activities to accompany: Mathematics for elementary teachers (2a. ed.). Pearson Education.
Citace podle Chicago (17th ed.)Beckmann, Sybilla. Activities to Accompany: Mathematics for Elementary Teachers. 2a. ed. Boston: Pearson Education, 2008.
Citace podle MLA (9th ed.)Beckmann, Sybilla. Activities to Accompany: Mathematics for Elementary Teachers. 2a. ed. Pearson Education, 2008.
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