Gardner, L. C. (2013). Killing machine: The American Presidency in the age of drone warfare. The New Press.
Chicago-referens (17:e uppl.)Gardner, Lloyd C. Killing Machine: The American Presidency in the Age of Drone Warfare. New York: The New Press, 2013.
MLA-referens (9:e uppl.)Gardner, Lloyd C. Killing Machine: The American Presidency in the Age of Drone Warfare. The New Press, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.