APA (7th ed.) Citation

Berman, G., & Fryer, K. D. (1972). Introduction to combinatorics. Academic Press.

Chicago Style (17th ed.) Citation

Berman, Gerald, and K. D. Fryer. Introduction to Combinatorics. Nueva York: Academic Press, 1972.

MLA (9th ed.) Citation

Berman, Gerald, and K. D. Fryer. Introduction to Combinatorics. Academic Press, 1972.