Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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