Penzler, O. (2007). The vicious circle: Mystery and crime stories by members of the Algonquin Round Table (1st Pegasus Books ed.). Pegasus Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenzler, Otto. The Vicious Circle: Mystery and Crime Stories by Members of the Algonquin Round Table. 1st Pegasus Books ed. New York: Pegasus Books, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPenzler, Otto. The Vicious Circle: Mystery and Crime Stories by Members of the Algonquin Round Table. 1st Pegasus Books ed. Pegasus Books, 2007.
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