APA (7th ed.) Citation

Clark, A. J. H., & Clark, D. H. (1999). Aliens: Can we make contact with extraterrestrial intelligence? (1st Fromm International ed.). Fromm International.

Chicago Style (17th ed.) Citation

Clark, Andrew J. H., and David H. Clark. Aliens: Can We Make Contact with Extraterrestrial Intelligence? 1st Fromm International ed. New York: Fromm International, 1999.

MLA (9th ed.) Citation

Clark, Andrew J. H., and David H. Clark. Aliens: Can We Make Contact with Extraterrestrial Intelligence? 1st Fromm International ed. Fromm International, 1999.