Cita APA (7th ed.)

Larson, R., & Falvo, D. C. (2014). Precalculus (Ninth edition.). Brooks/Cole, Cengage Learning.

Cita Chicago (17th ed.)

Larson, Ron, i David C. Falvo. Precalculus. Ninth edition. Australia: Brooks/Cole, Cengage Learning, 2014.

Cita MLA (9th ed.)

Larson, Ron, i David C. Falvo. Precalculus. Ninth edition. Brooks/Cole, Cengage Learning, 2014.