West, N. (2006). At her majesty's secret service: The chiefs of Britain's Intelligence Agency, M16. Greenhill Books [u.a.].
Chicago-Zitierstil (17. Ausg.)West, Nigel. At Her Majesty's Secret Service: The Chiefs of Britain's Intelligence Agency, M16. London [u.a.]: Greenhill Books [u.a.], 2006.
MLA-Zitierstil (9. Ausg.)West, Nigel. At Her Majesty's Secret Service: The Chiefs of Britain's Intelligence Agency, M16. Greenhill Books [u.a.], 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.