Cita APA (7th ed.)
Powers, T. The Man Who Kept the Secrets: Richard Helms and the CIA. Alfred A. Knopf.
Cita Chicago (17th ed.)
Powers, Thomas. The Man Who Kept the Secrets: Richard Helms and the CIA. Nueva York, EUA: Alfred A. Knopf.
Cita MLA (9th ed.)
Powers, Thomas. The Man Who Kept the Secrets: Richard Helms and the CIA. Alfred A. Knopf.
Atenció: Aquestes cites poden no estar 100% correctes.