Graves, C. (1836). Theorem, relative to confocal surfaces.
Lua i Stíl Chicago (17ú heag.)Graves, Charles. Theorem, Relative to Confocal Surfaces. 1836.
Lua MLA (9ú heag.)Graves, Charles. Theorem, Relative to Confocal Surfaces. 1836.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
