Cita APA (7th ed.)

Gilbert, L., & Gilbert, J. (1990). Precalculus: Functions and graphs. Addison_wesley.

Cita Chicago (17th ed.)

Gilbert, Linda, i Jimmy Gilbert. Precalculus: Functions and Graphs. Reading, Mass: Addison_wesley, 1990.

Cita MLA (9th ed.)

Gilbert, Linda, i Jimmy Gilbert. Precalculus: Functions and Graphs. Addison_wesley, 1990.