Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Vilenkin, N. Y. Combinatorics. Nueva York: Academic Press, 1971.

Cita MLA (9th ed.)

Vilenkin, N. Y. Combinatorics. Academic Press, 1971.