Cita APA (7th ed.)
Gallian, J. A. (1990). Contemporary abstract algebra (2nd ed.). D.C. Heath.
Cita Chicago (17th ed.)
Gallian, Joseph A. Contemporary Abstract Algebra. 2nd ed. Lexington: D.C. Heath, 1990.
Cita MLA (9th ed.)
Gallian, Joseph A. Contemporary Abstract Algebra. 2nd ed. D.C. Heath, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.