APA (7th ed.) Citation

Trevor-Roper, Howard, & Harrison. (2014). The secret world: Behind the curtain of British intelligence in World War II and the Cold War. I.B. Tauris.

Chicago Style (17th ed.) Citation

Trevor-Roper, Howard, and Harrison. The Secret World: Behind the Curtain of British Intelligence in World War II and the Cold War. London: I.B. Tauris, 2014.

MLA (8th ed.) Citation

Trevor-Roper, et al. The Secret World: Behind the Curtain of British Intelligence in World War II and the Cold War. I.B. Tauris, 2014.