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                                GCHQ : The Secret Wireless War 1900-86 | Bok | 940.5485 Wes West, Nigel /  - London : Weidenfeldt and Nicholson, 1986. [Bok]. - 400 s. - Språk: Engelsk | West, Nigel | 1986 | 
			
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                                Secret Service : The Making of a British Intelligence Community | Bok | 940.54 And Andrew, Christopher /  - London : Hinemann, 1985. [Bok]. - 619 s. - Språk: Engelsk | Andrew, Christopher | 1985 | 
			
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                                The Black Game : British Subversige Operations against the German during the Second World War | Bok | 940.54 How Howe, Ellic /  - London : Michael Joseph, 1982. [Bok]. - 276 s. - Språk: Engelsk | Howe, Ellic | 1982 | 
			
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                                The Secret Forces of World War ll | Bok | 940.54 War Warner, Philip /  - London : Granada, 1985. [Bok]. - 245 s. - Språk: Engelsk | Warner, Philip | 1985 | 
			
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                                The Story of Secret Service | Bok | 355.3432 Row Rowan, Richard Wilmer  /  - London : John Miles, 1938. [Bok]. - 773 s. - Språk: Engelsk | Rowan, Richard Wilmer  | 1938 | 
			
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                                Very Special Intelligence : the Story of the Admiralty's Operational Intelligence Centre 1939-45 | Bok | 940.54 Bee Beesly, Patrick /  - London : Hamish Hamilton, 1977. [Bok]. - 271 s. - Språk: Engelsk | Beesly, Patrick | 1977 |