APA (7th ed.) Citation

Powers, T. (1980). The man who kept the secrets: Richard Helms and the CIA. Weideafelds and Nicholson.

Chicago Style (17th ed.) Citation

Powers, Thomas. The Man Who Kept the Secrets: Richard Helms and the CIA. London: Weideafelds and Nicholson, 1980.

MLA (9th ed.) Citation

Powers, Thomas. The Man Who Kept the Secrets: Richard Helms and the CIA. Weideafelds and Nicholson, 1980.