Cita APA (7th ed.)

Swokowski, E. W. (2019). Precalculus: Functions & graphs (13th edition.). Cengage.

Cita Chicago (17th ed.)

Swokowski, Earl W. Precalculus: Functions & Graphs. 13th edition. Boston, MA: Cengage, 2019.

Cita MLA (9th ed.)

Swokowski, Earl W. Precalculus: Functions & Graphs. 13th edition. Cengage, 2019.