Comfort, R. A. (1966). Revolutionary Hamburg: Labor politics in the early Weimar Republic. Stanford University Press.
Lua i Stíl Chicago (17ú heag.)Comfort, Richard A. Revolutionary Hamburg: Labor Politics in the Early Weimar Republic. Standford, Calif: Stanford University Press, 1966.
Lua MLA (9ú heag.)Comfort, Richard A. Revolutionary Hamburg: Labor Politics in the Early Weimar Republic. Stanford University Press, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.