Pólya, G. (1968). Mathematics and plausible reasoning (2nd ed.). Princeton University Press.
Chicago (17e ed.) BronvermeldingPólya, George. Mathematics and Plausible Reasoning. 2nd ed. Princeton, N.J: Princeton University Press, 1968.
MLA (9e ed.) BronvermeldingPólya, George. Mathematics and Plausible Reasoning. 2nd ed. Princeton University Press, 1968.
Let op: Deze citaties zijn niet altijd 100% accuraat.