Thomson, P. (1989). The Poetry of Brecht: Seven Studies. University of North Carolina Press.
Lua i Stíl Chicago (17ú heag.)Thomson, Philip. The Poetry of Brecht: Seven Studies. Chapel Hill: University of North Carolina Press, 1989.
Lua MLA (9ú heag.)Thomson, Philip. The Poetry of Brecht: Seven Studies. University of North Carolina Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.