Cita APA (7th ed.)

Sullivan, M. (2003). Precalculus: Enhanced with graphing utilities (3a. ed.). Prentice Hall.

Cita Chicago (17th ed.)

Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 3a. ed. Upper Saddle River: Prentice Hall, 2003.

Cita MLA (9th ed.)

Sullivan, Michael. Precalculus: Enhanced with Graphing Utilities. 3a. ed. Prentice Hall, 2003.