Sen, D. (1964). Geometry & co-ordinate Geometry. Educational Pub. Co.
Lua i Stíl Chicago (17ú heag.)Sen, D. Geometry & Co-ordinate Geometry. Bombay: Educational Pub. Co, 1964.
Lua MLA (9ú heag.)Sen, D. Geometry & Co-ordinate Geometry. Educational Pub. Co, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.