Cita APA (7th ed.)

Gilbert, L., & Gilbert, J. (1990). Precalculus: Functions and graphs. McGraw-Hill.

Cita Chicago (17th ed.)

Gilbert, Linda, i Jimmie Gilbert. Precalculus: Functions and Graphs. New York: McGraw-Hill, 1990.

Cita MLA (9th ed.)

Gilbert, Linda, i Jimmie Gilbert. Precalculus: Functions and Graphs. McGraw-Hill, 1990.