Cita APA (7th ed.)

Demana, F. (1997). Precalculus: A graphing approach (4th ed.). Addison-Wesley.

Cita Chicago (17th ed.)

Demana, Franklin. Precalculus: A Graphing Approach. 4th ed. Menlo Park, California: Addison-Wesley, 1997.

Cita MLA (9th ed.)

Demana, Franklin. Precalculus: A Graphing Approach. 4th ed. Addison-Wesley, 1997.