APA (7th ed.) Citation

Billings, H. (1999). Aliens & UFOs: 21 famous UFO sightings--with exercises for developing critical reading skills. Jamestown.

Chicago Style (17th ed.) Citation

Billings, Henry. Aliens & UFOs: 21 Famous UFO Sightings--with Exercises for Developing Critical Reading Skills. Lincolnwood, IL: Jamestown, 1999.

MLA (9th ed.) Citation

Billings, Henry. Aliens & UFOs: 21 Famous UFO Sightings--with Exercises for Developing Critical Reading Skills. Jamestown, 1999.