Não informado. (1970). Journal for Research in Mathematics Education. National Council of Teachers of Mathematics.
Chicagoスタイル(17版)引用形式Não informado. Journal for Research in Mathematics Education. Reston, Va: National Council of Teachers of Mathematics, 1970.
MLA(8版)引用形式Não informado. Journal for Research in Mathematics Education. National Council of Teachers of Mathematics, 1970.
警告: この引用は必ずしも正確ではありません.