Sperberg, C. M. (1979). Approaching Mother Courage: Or, Who's afraid of Bertolt Bn. Humanities Honors Program, Stanford University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSperberg, Christopher Michael. Approaching Mother Courage: Or, Who's Afraid of Bertolt Bn. Stanford, Calif: Humanities Honors Program, Stanford University, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSperberg, Christopher Michael. Approaching Mother Courage: Or, Who's Afraid of Bertolt Bn. Humanities Honors Program, Stanford University, 1979.
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