APA (7th ed.) Citation

Martin, J., Nugus, P., & Powell, R. (2005). Churchill's bodyguard. BBC Worldwide.

Chicago Style (17th ed.) Citation

Martin, Jonathan, Philip Nugus, and Robert Powell. Churchill's Bodyguard. London, England: BBC Worldwide, 2005.

MLA (9th ed.) Citation

Martin, Jonathan, et al. Churchill's Bodyguard. BBC Worldwide, 2005.