APA (7th ed.) Citation

Kuiper, T. B. H., & Morris, M. (1977). Searching for extraterrestrial civilizations. Science, 196, 616.

Chicago Style (17th ed.) Citation

Kuiper, T. B. H., and M. Morris. "Searching for Extraterrestrial Civilizations." Science 196 (1977): 616.

MLA (9th ed.) Citation

Kuiper, T. B. H., and M. Morris. "Searching for Extraterrestrial Civilizations." Science, vol. 196, 1977, p. 616.