Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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