Russell, B. (1956). An essay on the foundations of geometry. Dover.
Lua i Stíl Chicago (17ú heag.)Russell, Bertrand. An Essay on the Foundations of Geometry. New York: Dover, 1956.
Lua MLA (8ú heag.)Russell, Bertrand. An Essay on the Foundations of Geometry. Dover, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.