APA (7th ed.) Citation

Regis, E. (1985). Extraterrestrials: Science and alien intelligence. Cambridge University Press.

Chicago Style (17th ed.) Citation

Regis, Edward. Extraterrestrials: Science and Alien Intelligence. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1985.

MLA (8th ed.) Citation

Regis, Edward. Extraterrestrials: Science and Alien Intelligence. Cambridge University Press, 1985.