Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.