APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Trevor-Roper, H. R., and E. D. R. Harrison. The Secret World: Behind the Curtain of British Intelligence in World War II and the Cold War. London: I.B. Tauris & Co. Ltd, 2014.

MLA (9th ed.) Citation

Trevor-Roper, H. R., and E. D. R. Harrison. The Secret World: Behind the Curtain of British Intelligence in World War II and the Cold War. I.B. Tauris & Co. Ltd, 2014.