APA (7th ed.) Citation

Brualdi, R. A. (1977). Introductory combinatorics. North Holland.

Chicago Style (17th ed.) Citation

Brualdi, Richard A. Introductory Combinatorics. Nueva York: North Holland, 1977.

MLA (9th ed.) Citation

Brualdi, Richard A. Introductory Combinatorics. North Holland, 1977.