Gardner, L. C. (2013). Killing machine: The American Presidency in the age of drone warfare. The New Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGardner, Lloyd C. Killing Machine: The American Presidency in the Age of Drone Warfare. New York: The New Press, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGardner, Lloyd C. Killing Machine: The American Presidency in the Age of Drone Warfare. The New Press, 2013.
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