Cita APA (7th ed.)

Larson, R., Heyd, D. E., Hostetler, R. P., & Edwards, B. H. (1997). Precalculus with limits: A graphing approach (2nd ed.). Houghton Mifflin.

Cita Chicago (17th ed.)

Larson, Ron, David E. Heyd, Robert P. Hostetler, i Bruce H. Edwards. Precalculus with Limits: A Graphing Approach. 2nd ed. Boston: Houghton Mifflin, 1997.

Cita MLA (9th ed.)

Larson, Ron, et al. Precalculus with Limits: A Graphing Approach. 2nd ed. Houghton Mifflin, 1997.