Nelsen, R. B. (1993). Proofs without words: Exercises in visual thinking. The Mathematical Association of America.
Chicago (17e ed.) BronvermeldingNelsen, Roger B. Proofs Without Words: Exercises in Visual Thinking. Washington, DC: The Mathematical Association of America, 1993.
MLA (9e ed.) BronvermeldingNelsen, Roger B. Proofs Without Words: Exercises in Visual Thinking. The Mathematical Association of America, 1993.
Let op: Deze citaties zijn niet altijd 100% accuraat.