Sagan, C., & Shklovskii, I. (1966). Intelligent life in the universe. Dell Publishing.
Chicago Style (17th ed.) CitationSagan, Carl, and I.S Shklovskii. Intelligent Life in the Universe. New York: Dell Publishing, 1966.
MLA (9th ed.) CitationSagan, Carl, and I.S Shklovskii. Intelligent Life in the Universe. Dell Publishing, 1966.
Warning: These citations may not always be 100% accurate.