Leroy, F. Geometrie descriptive.
Lua i Stíl Chicago (17ú heag.)Leroy, F. Geometrie Descriptive.
Lua MLA (8ú heag.)Leroy, F. Geometrie Descriptive.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)