Hudelson, R., & Ross, C. (2006). By the ore docks: A working people's history of Duluth. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)Hudelson, Richard, agus Carl Ross. By the Ore Docks: A Working People's History of Duluth. Minneapolis: University of Minnesota Press, 2006.
Lua MLA (9ú heag.)Hudelson, Richard, agus Carl Ross. By the Ore Docks: A Working People's History of Duluth. University of Minnesota Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.