Não informado. (2003). Engineering and contracting. Gillette Publishing Company.
Lua i Stíl Chicago (17ú heag.)Não informado. Engineering and Contracting. Hammond, Ind: Gillette Publishing Company, 2003.
Lua MLA (8ú heag.)Não informado. Engineering and Contracting. Gillette Publishing Company, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.