APA (7th ed.) Citation

Nagell, T. (1964). Introduction to number theory (2d ed.). Chelsea Pub.

Chicago Style (17th ed.) Citation

Nagell, Trygve. Introduction to Number Theory. 2d ed. New York: Chelsea Pub, 1964.

MLA (9th ed.) Citation

Nagell, Trygve. Introduction to Number Theory. 2d ed. Chelsea Pub, 1964.