APA (7th ed.) Citation

Brualdi, R. A. Introductory Combinatorics (4th.).

Chicago Style (17th ed.) Citation

Brualdi, Richard A. Introductory Combinatorics. 4th.

MLA (9th ed.) Citation

Brualdi, Richard A. Introductory Combinatorics. 4th.

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