Não informado. (1994). Teaching Children Mathematics. National Council of Teachers of Mathematics.
Chicago (17e ed.) BronvermeldingNão informado. Teaching Children Mathematics. Reston, Va: National Council of Teachers of Mathematics, 1994.
MLA (8e ed.) BronvermeldingNão informado. Teaching Children Mathematics. National Council of Teachers of Mathematics, 1994.
Let op: Deze citaties zijn niet altijd 100% accuraat.