APA (7th ed.) Citation

Sanderson, I. T. (1967). Uninvited visitors: A biologist looks at UFO's ([1st ed.). Cowles Education Corp..

Chicago Style (17th ed.) Citation

Sanderson, Ivan Terence. Uninvited Visitors: A Biologist Looks at UFO's. [1st ed. New York: Cowles Education Corp., 1967.

MLA (9th ed.) Citation

Sanderson, Ivan Terence. Uninvited Visitors: A Biologist Looks at UFO's. [1st ed. Cowles Education Corp., 1967.