Bennett, J. R., & Utz, K. R. (2010). Iron & steel: A guide to Birmingham area industrial heritage sites. University of Alabama Press.
Lua i Stíl Chicago (17ú heag.)Bennett, James R., agus Karen R. Utz. Iron & Steel: A Guide to Birmingham Area Industrial Heritage Sites. Tuscaloosa: University of Alabama Press, 2010.
Lua MLA (9ú heag.)Bennett, James R., agus Karen R. Utz. Iron & Steel: A Guide to Birmingham Area Industrial Heritage Sites. University of Alabama Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.