APA (7th ed.) Zitazioa
Basalla, G. (2006). Civilized life in the universe: Scientists on intelligent extraterrestrials. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Basalla, George. Civilized Life in the Universe: Scientists on Intelligent Extraterrestrials. Oxford ; New York: Oxford University Press, 2006.
MLA (9th ed.) Zitazioa
Basalla, George. Civilized Life in the Universe: Scientists on Intelligent Extraterrestrials. Oxford University Press, 2006.
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