Não informado. (1994). Teaching Children Mathematics. National Council of Teachers of Mathematics.
Cita Chicago Style (17a ed.)Não informado. Teaching Children Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.
Cita MLA (8a ed.)Não informado. Teaching Children Mathematics. National Council of Teachers of Mathematics, 1994.
Precaución: Estas citas no son 100% exactas.