Não informado. (1980). For the Learning of Mathematics. FLM Publishing Association.
Chicago (17e ed.) BronvermeldingNão informado. For the Learning of Mathematics. Montreal, Canada: FLM Publishing Association, 1980.
MLA (8e ed.) BronvermeldingNão informado. For the Learning of Mathematics. FLM Publishing Association, 1980.
Let op: Deze citaties zijn niet altijd 100% accuraat.