Cofman, J. (1995). Numbers and shapes revisited: More problems for young mathematicians. Clarendon Press.
Chicago (17e ed.) BronvermeldingCofman, Judita. Numbers and Shapes Revisited: More Problems for Young Mathematicians. Oxford, [Eng.]: Clarendon Press, 1995.
MLA (9e ed.) BronvermeldingCofman, Judita. Numbers and Shapes Revisited: More Problems for Young Mathematicians. Clarendon Press, 1995.
Let op: Deze citaties zijn niet altijd 100% accuraat.