Não informado. (1994). Teaching Children Mathematics. National Council of Teachers of Mathematics.
Chicagoスタイル(17版)引用形式Não informado. Teaching Children Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.
MLA(8版)引用形式Não informado. Teaching Children Mathematics. National Council of Teachers of Mathematics, 1994.
警告: この引用は必ずしも正確ではありません.