James, H. (2012). Krupp: A history of the legendary German firm. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)James, Harold. Krupp: A History of the Legendary German Firm. Princeton: Princeton University Press, 2012.
Lua MLA (9ú heag.)James, Harold. Krupp: A History of the Legendary German Firm. Princeton University Press, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.