APA (7th ed.) Citation

Vilenkin, N. �. (1971). Combinatorics. Academic Press.

Chicago Style (17th ed.) Citation

Vilenkin, N. �I‍A. Combinatorics. New York: Academic Press, 1971.

MLA (9th ed.) Citation

Vilenkin, N. �I‍A. Combinatorics. Academic Press, 1971.

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