Warren, K. (1975). World steel: An economic geography. David & Charles.
Lua i Stíl Chicago (17ú heag.)Warren, Kenneth. World Steel: An Economic Geography. Newton Abbot [Eng.]: David & Charles, 1975.
Lua MLA (9ú heag.)Warren, Kenneth. World Steel: An Economic Geography. David & Charles, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.