Παραπομπή APA

Riordan, J. (1968). Combinatorial identities. John Wiley and Sons.

Παραπομπή Chicago Style

Riordan, John. Combinatorial Identities. New York: John Wiley and Sons, 1968.

Παραπομπή MLA

Riordan, John. Combinatorial Identities. John Wiley and Sons, 1968.