Bolt, S. (1997). Roofing the right way. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Bolt, Steven. Roofing the Right Way. McGraw-Hill, 1997.
Lua MLA (8ú heag.)Bolt, Steven. Roofing the Right Way. McGraw-Hill, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.