Welchons, A. M. (1944). Solid Geometry: A Self-Teaching Course. Ginn.
Lua i Stíl Chicago (17ú heag.)Welchons, A. M. Solid Geometry: A Self-Teaching Course. Washington: Ginn, 1944.
Lua MLA (9ú heag.)Welchons, A. M. Solid Geometry: A Self-Teaching Course. Ginn, 1944.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.