Perry, D. L. (2009). Partly cloudy: Ethics in war, espionage, covert action, and interrogation. Scarecrow professional intelligence education series.
Chicago-Zitierstil (17. Ausg.)Perry, David L. "Partly Cloudy: Ethics in War, Espionage, Covert Action, and Interrogation." Scarecrow Professional Intelligence Education Series 2009.
MLA-Zitierstil (8. Ausg.)Perry, David L. "Partly Cloudy: Ethics in War, Espionage, Covert Action, and Interrogation." Scarecrow Professional Intelligence Education Series, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.