APA (7th ed.) Citation

Rood, R. T., & Trefil, J. S. (1981). Are we alone?: The possibility of extraterrestrial civilizations. Scribner.

Chicago Style (17th ed.) Citation

Rood, Robert T., and James S. Trefil. Are We Alone?: The Possibility of Extraterrestrial Civilizations. New York: Scribner, 1981.

MLA (9th ed.) Citation

Rood, Robert T., and James S. Trefil. Are We Alone?: The Possibility of Extraterrestrial Civilizations. Scribner, 1981.