APA-referens (7:e uppl.)

Rich, B. (1963). Principles & problems of plane geometry. Schaum Pub. Co.

Chicago-referens (17:e uppl.)

Rich, Barnett. Principles & Problems of Plane Geometry. New York: Schaum Pub. Co, 1963.

MLA-referens (9:e uppl.)

Rich, Barnett. Principles & Problems of Plane Geometry. Schaum Pub. Co, 1963.