Whitaker, P. (1985). Brecht's poetry: A critical study. Clarendon Pr..
Lua i Stíl Chicago (17ú heag.)Whitaker, Peter. Brecht's Poetry: A Critical Study. Oxford: Clarendon Pr., 1985.
Lua MLA (8ú heag.)Whitaker, Peter. Brecht's Poetry: A Critical Study. Clarendon Pr., 1985.
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