APA (7th ed.) Citation

Niven, I., Zuckerman, H. S., & Montgomery, H. L. (1991). An Introduction to the Theory of Numbers (5th ed.). John Wiley & Sons.

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: John Wiley & Sons, 1991.

MLA (9th ed.) Citation

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