Helms, C., & Black, C. M. (2013). An intriguing life: A memoir of war, Washington, and marriage to an American spymaster. Rowman & Littlefield Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHelms, Cynthia, और Christine M. Black. An Intriguing Life: A Memoir of War, Washington, and Marriage to an American Spymaster. Lanham: Rowman & Littlefield Publishers, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHelms, Cynthia, और Christine M. Black. An Intriguing Life: A Memoir of War, Washington, and Marriage to an American Spymaster. Rowman & Littlefield Publishers, 2013.
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