Blackell, E. A. "What the devil?!" - twentieth-century Faust: Eric A. Blackell. Faust through four centuries : retrospect and analysis=Vierhundert Jahre Faust : Rückblick und Analyse.(1989).
Čikaški stil citiranja (17. izdanje)Blackell, Eric A. ""What the Devil?!" - Twentieth-century Faust: Eric A. Blackell." Faust Through Four Centuries : Retrospect and Analysis=Vierhundert Jahre Faust : Rückblick Und Analyse.(1989) .
MLA način citiranja (8. izdanje)Blackell, Eric A. ""What the Devil?!" - Twentieth-century Faust: Eric A. Blackell." Faust Through Four Centuries : Retrospect and Analysis=Vierhundert Jahre Faust : Rückblick Und Analyse.(1989), .
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