Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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