APA (7th ed.) Citation

Wilson, R. (2002). Graphs, colourings, and the four-colour theorem. Oxford University Press.

Chicago Style (17th ed.) Citation

Wilson, Robert. Graphs, Colourings, and the Four-colour Theorem. Oxford, New York: Oxford University Press, 2002.

MLA (9th ed.) Citation

Wilson, Robert. Graphs, Colourings, and the Four-colour Theorem. Oxford University Press, 2002.