APA (7th ed.) Citation

Nelsen, R. B. (1993). Proofs without words. MAA Press, an imprint of the American Mathematical Society. https://doi.org/10.1090/clrm/001

Chicago Style (17th ed.) Citation

Nelsen, Roger B. Proofs Without Words. Providence, Rhode Island: MAA Press, an imprint of the American Mathematical Society, 1993. https://doi.org/10.1090/clrm/001.

MLA (9th ed.) Citation

Nelsen, Roger B. Proofs Without Words. MAA Press, an imprint of the American Mathematical Society, 1993. https://doi.org/10.1090/clrm/001.