Faires, J. D., & DeFranza, J. (2000). Precalculus (2nd ed.). Brooks/Cole.
Cita Chicago (17th ed.)Faires, J. Douglas, i James DeFranza. Precalculus. 2nd ed. Pacific Grove: Brooks/Cole, 2000.
Cita MLA (9th ed.)Faires, J. Douglas, i James DeFranza. Precalculus. 2nd ed. Brooks/Cole, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.