Powell, H. A neglected Faustian drama and its cultural roots in seventeenth-century Germany: Hugh Powell. Faust through four centuries : retrospect and analysis=Vierhundert Jahre Faust : Rückblick und Analyse.(1989).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Powell, Hugh. "A Neglected Faustian Drama and Its Cultural Roots in Seventeenth-century Germany: Hugh Powell." Faust Through Four Centuries : Retrospect and Analysis=Vierhundert Jahre Faust : Rückblick Und Analyse.(1989) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Powell, Hugh. "A Neglected Faustian Drama and Its Cultural Roots in Seventeenth-century Germany: Hugh Powell." Faust Through Four Centuries : Retrospect and Analysis=Vierhundert Jahre Faust : Rückblick Und Analyse.(1989), .
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.