APA (7th ed.) Citation

Jeffery, K. (2011). MI6 the history of the Secret Intelligence Service, 1909-1949 / Keith Jeffery: The history of the Secret Intelligence Service, 1909-1949. Bloomsbury.

Chicago Style (17th ed.) Citation

Jeffery, Keith. MI6 the History of the Secret Intelligence Service, 1909-1949 / Keith Jeffery: The History of the Secret Intelligence Service, 1909-1949. London: Bloomsbury, 2011.

MLA (9th ed.) Citation

Jeffery, Keith. MI6 the History of the Secret Intelligence Service, 1909-1949 / Keith Jeffery: The History of the Secret Intelligence Service, 1909-1949. Bloomsbury, 2011.

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