Perry, D. L. (2009). Partly cloudy: Ethics in war, espionage, covert action, and interrogation. Scarecrow professional intelligence education series.
芝加哥风格引文Perry, David L. "Partly Cloudy: Ethics in War, Espionage, Covert Action, and Interrogation." Scarecrow Professional Intelligence Education Series 2009.
MLA引文Perry, David L. "Partly Cloudy: Ethics in War, Espionage, Covert Action, and Interrogation." Scarecrow Professional Intelligence Education Series, 2009.
警告：这些引文格式不一定是100％准确.