United Nations Industrial Development Organization. (1977). Information sources on the iron and steel industry. United Nations.
Lua i Stíl Chicago (17ú heag.)United Nations Industrial Development Organization. Information Sources on the Iron and Steel Industry. New York: United Nations, 1977.
Lua MLA (9ú heag.)United Nations Industrial Development Organization. Information Sources on the Iron and Steel Industry. United Nations, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.