Cita APA (7th ed.)

Barnett, R. A., & Ziegler, M. R. (1993). Precalculus: Functions and graphs (3rd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Barnett, Raymond A., i Micheal R. Ziegler. Precalculus: Functions and Graphs. 3rd ed. New York: McGraw-Hill, 1993.

Cita MLA (9th ed.)

Barnett, Raymond A., i Micheal R. Ziegler. Precalculus: Functions and Graphs. 3rd ed. McGraw-Hill, 1993.