Coburn, J. W. (2007). Precalculus. McGraw-Hill Higher Education.
Cita Chicago (17th ed.)Coburn, John W. Precalculus. Boston: McGraw-Hill Higher Education, 2007.
Cita MLA (9th ed.)Coburn, John W. Precalculus. McGraw-Hill Higher Education, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.