APA (7th ed.) Citation

(2009). The UFO files: The inside story of real-life sightings. National Archives.

Chicago Style (17th ed.) Citation

The UFO Files: The Inside Story of Real-life Sightings. Kew, Richmond, Surrey, U.K: National Archives, 2009.

MLA (9th ed.) Citation

The UFO Files: The Inside Story of Real-life Sightings. National Archives, 2009.

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