APA (7th ed.) Citation

Devlin, K. J. (2008). The unfinished game: Pascal, Fermat, and the seventeenth-century letter that made the world modern. Basic Books.

Chicago Style (17th ed.) Citation

Devlin, Keith J. The Unfinished Game: Pascal, Fermat, and the Seventeenth-century Letter That Made the World Modern. New York: Basic Books, 2008.

MLA (9th ed.) Citation

Devlin, Keith J. The Unfinished Game: Pascal, Fermat, and the Seventeenth-century Letter That Made the World Modern. Basic Books, 2008.

Warning: These citations may not always be 100% accurate.