APA (7th ed.) Citation

O'Daffer, P. G., Clemens, S. R., & Hirstein, J. (1992). Geometry: An investigative approach (2nd ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

O'Daffer, Phares G., Stanley R. Clemens, and James Hirstein. Geometry: An Investigative Approach. 2nd ed. Reading, MA: Addison-Wesley, 1992.

MLA (9th ed.) Citation

O'Daffer, Phares G., et al. Geometry: An Investigative Approach. 2nd ed. Addison-Wesley, 1992.