Cita APA (7th ed.)

Sullivan, M. (2006). Precalculus: Enhanced with graphing utilities (4a. ed.). Pearson Prentice Hall.

Cita Chicago (17th ed.)

Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 4a. ed. Upper Saddle River: Pearson Prentice Hall, 2006.

Cita MLA (9th ed.)

Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 4a. ed. Pearson Prentice Hall, 2006.