Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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