APA (7th ed.) Citation

Stitz, C., & Zeager, J. (2013). Precalculus. Stitz Zeager Open Source Mathematics.

Chicago Style (17th ed.) Citation

Stitz, Carl, and Jeff Zeager. Precalculus. [Place of publication not identified]: Stitz Zeager Open Source Mathematics, 2013.

MLA (9th ed.) Citation

Stitz, Carl, and Jeff Zeager. Precalculus. Stitz Zeager Open Source Mathematics, 2013.