Sellers, G. R. (1981). Intermediate Algebra (2nd ed.). Brooks/Cole Publishing.
Cita Chicago (17th ed.)Sellers, Gene R. Intermediate Algebra. 2nd ed. Monterey, CA: Brooks/Cole Publishing, 1981.
Cita MLA (9th ed.)Sellers, Gene R. Intermediate Algebra. 2nd ed. Brooks/Cole Publishing, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.