Cumming, C. (2017). A divided spy (First edition.). St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCumming, Charles. A Divided Spy. First edition. New York: St. Martin's Press, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCumming, Charles. A Divided Spy. First edition. St. Martin's Press, 2017.
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