Cita APA

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

Chicago Edition Citation

Wallis, W D., i J.C George. Introduction to Combinatorics. Boca Raton: Chapman & Hall/CRC, 2011.

Cita MLA

Wallis, W D., i J.C George. Introduction to Combinatorics. Chapman & Hall/CRC, 2011.