Knust, H. Piscator and Brecht: Affinity and alienation / Herbert Knust. Essays on Brecht : theater and politics.(1974).
Lua i Stíl Chicago (17ú heag.)Knust, Herbert. "Piscator and Brecht: Affinity and Alienation / Herbert Knust." Essays on Brecht : Theater and Politics.(1974) .
Lua MLA (8ú heag.)Knust, Herbert. "Piscator and Brecht: Affinity and Alienation / Herbert Knust." Essays on Brecht : Theater and Politics.(1974), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.