Dudley, U. (2008). Elementary number theory (2d ed., Dover ed.). Dover Publications.
Cita Chicago (17th ed.)Dudley, Underwood. Elementary Number Theory. 2d ed., Dover ed. Mineola, N.Y.: Dover Publications, 2008.
Cita MLA (8th ed.)Dudley, Underwood. Elementary Number Theory. 2d ed., Dover ed. Dover Publications, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.