Whipple, C. (2020). The spymasters: How the CIA directors shape history and the future (First Scribner hardcover edition.). Scribner.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWhipple, Chris. The Spymasters: How the CIA Directors Shape History and the Future. First Scribner hardcover edition. New York: Scribner, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWhipple, Chris. The Spymasters: How the CIA Directors Shape History and the Future. First Scribner hardcover edition. Scribner, 2020.
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