Cita APA (7a ed.)

Nagell, T. (1951). Introduction to number theory. John Wiley.

Cita Chicago Style (17a ed.)

Nagell, Trygve. Introduction to Number Theory. Nueva York: John Wiley, 1951.

Cita MLA (9a ed.)

Nagell, Trygve. Introduction to Number Theory. John Wiley, 1951.