AUFMANN, R. N., BARKER, V. C., & NATION, R. D., Jr. (1990). College algebra with trigonometry. Houghton Mifflin.
Cita Chicago (17th ed.)AUFMANN, Richard N., Vernon C. BARKER, i Richard D. NATION, Jr. College Algebra with Trigonometry. Boston: Houghton Mifflin, 1990.
Cita MLA (9th ed.)AUFMANN, Richard N., et al. College Algebra with Trigonometry. Houghton Mifflin, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.