APA (7th ed.) Citation

Wallis, W. D., & George, J. C. (2011). Introduction to combinatorics / W.D. Wallis, J.C. George. CRC Press.

Chicago Style (17th ed.) Citation

Wallis, W. D., and J. C. George. Introduction to Combinatorics / W.D. Wallis, J.C. George. Boca Raton, FL: CRC Press, 2011.

MLA (9th ed.) Citation

Wallis, W. D., and J. C. George. Introduction to Combinatorics / W.D. Wallis, J.C. George. CRC Press, 2011.

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