APA (7th ed.) Citation

Riordan John. (1967). An introduction to combinatorial analysis. John Wiley & Sons, Inc.

Chicago Style (17th ed.) Citation

Riordan John. An Introduction to Combinatorial Analysis. New York: John Wiley & Sons, Inc, 1967.

MLA (9th ed.) Citation

Riordan John. An Introduction to Combinatorial Analysis. John Wiley & Sons, Inc, 1967.