APA (7th ed.) Citation

Powers, T. (1980). The man who kept the secrets: Richard Helms & the CIA. Weidenfeld and Nicolson.

Chicago Style (17th ed.) Citation

Powers, Thomas. The Man Who Kept the Secrets: Richard Helms & the CIA. London: Weidenfeld and Nicolson, 1980.

MLA (8th ed.) Citation

Powers, Thomas. The Man Who Kept the Secrets: Richard Helms & the CIA. Weidenfeld and Nicolson, 1980.

Warning: These citations may not always be 100% accurate.