Wolfe, E. J. (2023). The Illinois Detective Agency: The case of Duffy's revenge (Large print edition.). Wheeler Publishing, a part of Gale, a Cengage Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWolfe, Ethan J. The Illinois Detective Agency: The Case of Duffy's Revenge. Large print edition. Waterville, Maine: Wheeler Publishing, a part of Gale, a Cengage Company, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWolfe, Ethan J. The Illinois Detective Agency: The Case of Duffy's Revenge. Large print edition. Wheeler Publishing, a part of Gale, a Cengage Company, 2023.
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