APA (7th ed.) Citation

Niven, I. M., & Niven, I. (1976). An introduction to the theory of numbers. Wiley.

Chicago Style (17th ed.) Citation

Niven, Ivan Morton, and Ivan;Zuckerman Niven. An Introduction to the Theory of Numbers. Wiley, 1976.

MLA (9th ed.) Citation

Niven, Ivan Morton, and Ivan;Zuckerman Niven. An Introduction to the Theory of Numbers. Wiley, 1976.

Warning: These citations may not always be 100% accurate.