APA (7th ed.) Citation

Harrison, A. A., & Vakoch, D. A. (2011). Civilizations beyond earth. Berghahn Books.

Chicago Style (17th ed.) Citation

Harrison, Albert A., and Douglas A. Vakoch. Civilizations Beyond Earth. New York: Berghahn Books, 2011.

MLA (9th ed.) Citation

Harrison, Albert A., and Douglas A. Vakoch. Civilizations Beyond Earth. Berghahn Books, 2011.