APA (7th ed.) Citation

Niven, I., Zuckerman, H. S., & Montgomery, H. L. (1991). An introduction to the theory of numbers (5th ed.). Wiley.

Chicago Style (17th ed.) Citation

Niven, Ivan, Herbert S. Zuckerman, and Hugh L. Montgomery. An Introduction to the Theory of Numbers. 5th ed. New York: Wiley, 1991.

MLA (9th ed.) Citation

Niven, Ivan, et al. An Introduction to the Theory of Numbers. 5th ed. Wiley, 1991.