APA (7th ed.) Citation

Niven, I. M., Zuckerman, H. S., & Montgomery, H. L. (1991). An introduction to the theory of numbers (Fifth edition.). Wiley.

Chicago Style (17th ed.) Citation

Niven, Ivan Morton, Herbert S. Zuckerman, and Hugh L. Montgomery. An Introduction to the Theory of Numbers. Fifth edition. New York; New Delhi: Wiley, 1991.

MLA (8th ed.) Citation

Niven, Ivan Morton, et al. An Introduction to the Theory of Numbers. Fifth edition. Wiley, 1991.