Wenzel-Burchard, G. <. (1981). Broken star: The Warburgs of Altona ; their life in Germany and their death in the Holocaust / Gertrud Wenzel (1. ed.). Exposition Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWenzel-Burchard, Gertrud <1906-1994>. Broken Star: The Warburgs of Altona ; Their Life in Germany and Their Death in the Holocaust / Gertrud Wenzel. 1. ed. Smithtown, NY: Exposition Press, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWenzel-Burchard, Gertrud <1906-1994>. Broken Star: The Warburgs of Altona ; Their Life in Germany and Their Death in the Holocaust / Gertrud Wenzel. 1. ed. Exposition Press, 1981.
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