Não informado. (1994). Mathematics Teaching in the Middle School. National Council of Teachers of Mathematics.
Citace podle Chicago (17th ed.)Não informado. Mathematics Teaching in the Middle School. Reston, Va: National Council of Teachers of Mathematics, 1994.
Citace podle MLA (8th ed.)Não informado. Mathematics Teaching in the Middle School. National Council of Teachers of Mathematics, 1994.
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