APA (7th ed.) Citation

(1997). UFOs and aliens (1. American ed.). DK Publ.

Chicago Style (17th ed.) Citation

UFOs and Aliens. 1. American ed. New York, NY: DK Publ, 1997.

MLA (9th ed.) Citation

UFOs and Aliens. 1. American ed. DK Publ, 1997.

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