National Council of Teachers of Mathematics. (1997). Fostering algebraic and geometric thinking: Selections from the NCTM standards. National Council of Teachers of Mathematics.
Citace podle Chicago (17th ed.)National Council of Teachers of Mathematics. Fostering Algebraic and Geometric Thinking: Selections from the NCTM Standards. Reston, VA: National Council of Teachers of Mathematics, 1997.
Citace podle MLA (9th ed.)National Council of Teachers of Mathematics. Fostering Algebraic and Geometric Thinking: Selections from the NCTM Standards. National Council of Teachers of Mathematics, 1997.
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