APA (7th ed.) Citation

Hawley, N., Suppes, P., & Gearhart, G. (1972). Geometry: Fun with fundamentals. Holden-Day.

Chicago Style (17th ed.) Citation

Hawley, Newton, Patrick Suppes, and George Gearhart. Geometry: Fun with Fundamentals. San Francisco: Holden-Day, 1972.

MLA (9th ed.) Citation

Hawley, Newton, et al. Geometry: Fun with Fundamentals. Holden-Day, 1972.