APA (7th ed.) Citation

Good, T. (1989). Above top secret: The worldwide UFO cover-up. Grafton Books.

Chicago Style (17th ed.) Citation

Good, Timothy. Above Top Secret: The Worldwide UFO Cover-up. London: Grafton Books, 1989.

MLA (9th ed.) Citation

Good, Timothy. Above Top Secret: The Worldwide UFO Cover-up. Grafton Books, 1989.

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