Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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