APA (7th ed.) Citation

Stillwell, J., Axler, S., & Ribet, K. (2005). The Four Pillars of Geometry. Springer Science+Business Media, Inc.

Chicago Style (17th ed.) Citation

Stillwell, John, S. Axler, and K.A Ribet. The Four Pillars of Geometry. New York, NY: Springer Science+Business Media, Inc, 2005.

MLA (8th ed.) Citation

Stillwell, John, et al. The Four Pillars of Geometry. Springer Science+Business Media, Inc, 2005.