Cohn, P. M. (2002). Basic Algebra: Groups, rings and fields. Springer.
Cita Chicago (17th ed.)Cohn, P. M. Basic Algebra: Groups, Rings and Fields. Bristol, United Kingdom: Springer, 2002.
Cita MLA (9th ed.)Cohn, P. M. Basic Algebra: Groups, Rings and Fields. Springer, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.