Wirth, A. Brecht: writer between ideology and politics: Andrzej Wirth. Essays on Brecht : theater and politics.(1974).
Lua i Stíl Chicago (17ú heag.)Wirth, Andrzej. "Brecht: Writer Between Ideology and Politics: Andrzej Wirth." Essays on Brecht : Theater and Politics.(1974) .
Lua MLA (8ú heag.)Wirth, Andrzej. "Brecht: Writer Between Ideology and Politics: Andrzej Wirth." Essays on Brecht : Theater and Politics.(1974), .
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