APA (7th ed.) Citation

Norton, A., Gaughan, J., & Valigursky, E. (1964). Key out of time ([First mass market paperback edition].). Ace Books.

Chicago Style (17th ed.) Citation

Norton, Andre, Jack Gaughan, and Ed Valigursky. Key Out of Time. [First mass market paperback edition]. New York: Ace Books, 1964.

MLA (9th ed.) Citation

Norton, Andre, et al. Key Out of Time. [First mass market paperback edition]. Ace Books, 1964.