Gibson, C. G. (2003). Elementary Euclidean geometry: An introduction. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Gibson, Christopher G. Elementary Euclidean Geometry: An Introduction. Cambridge, UK: Cambridge University Press, 2003.
Lua MLA (9ú heag.)Gibson, Christopher G. Elementary Euclidean Geometry: An Introduction. Cambridge University Press, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.