Não informado. (1971). Welding research international. Welding Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Welding Research International. Cambridge, Inglaterra: Welding Institute, 1971.
Lua MLA (8ú heag.)Não informado. Welding Research International. Welding Institute, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.