APA (7th ed.) Citation

O'Daffer, P. G., & Clemens, S. R. (1976). Geometry: An investigative approach. Addison-Wesley.

Chicago Style (17th ed.) Citation

O'Daffer, Phares G., and Stanley R. Clemens. Geometry: An Investigative Approach. Reading: Addison-Wesley, 1976.

MLA (9th ed.) Citation

O'Daffer, Phares G., and Stanley R. Clemens. Geometry: An Investigative Approach. Addison-Wesley, 1976.