APA (7th ed.) Citation

Mason, D. R. (1971). Horizon Alpha. Ballantine Books.

Chicago Style (17th ed.) Citation

Mason, Douglas R. Horizon Alpha. New York: Ballantine Books, 1971.

MLA (9th ed.) Citation

Mason, Douglas R. Horizon Alpha. Ballantine Books, 1971.

Warning: These citations may not always be 100% accurate.