Não informado. Steel Facts. American Iron and Steel Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Steel Facts. Washington: American Iron and Steel Institute.
Lua MLA (8ú heag.)Não informado. Steel Facts. American Iron and Steel Institute.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.