Fickert, K. J. (1972). To heaven and back: The new morality in the plays of Friedrich Dürrenmatt. Univ. Pr. of Kentucky.
Čikaški stil citiranja (17. izdanje)Fickert, Kurt J. To Heaven and Back: The New Morality in the Plays of Friedrich Dürrenmatt. Lexington: Univ. Pr. of Kentucky, 1972.
MLA način citiranja (8. izdanje)Fickert, Kurt J. To Heaven and Back: The New Morality in the Plays of Friedrich Dürrenmatt. Univ. Pr. of Kentucky, 1972.
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