Lyon, J. K. (1980). Bertolt Brecht in America. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Lyon, James K. Bertolt Brecht in America. Princeton, NJ: Princeton University Press, 1980.
Lua MLA (8ú heag.)Lyon, James K. Bertolt Brecht in America. Princeton University Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.