Lethen, H. (2002). Cool conduct: The culture of distance in Weimar Germany. University of California Press.
Lua i Stíl Chicago (17ú heag.)Lethen, Helmut. Cool Conduct: The Culture of Distance in Weimar Germany. Berkeley: University of California Press, 2002.
Lua MLA (9ú heag.)Lethen, Helmut. Cool Conduct: The Culture of Distance in Weimar Germany. University of California Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.