Não informado. Pipeline underground utilities construction. Oildom Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Pipeline Underground Utilities Construction. Houston, Tex: Oildom Publishing.
Lua MLA (8ú heag.)Não informado. Pipeline Underground Utilities Construction. Oildom Publishing.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.