APA (7th ed.) Citation

Pohl, F. (1985). Beyond the blue event horizon (5. print.). Ballantine Books.

Chicago Style (17th ed.) Citation

Pohl, Frederik. Beyond the Blue Event Horizon. 5. print. New York: Ballantine Books, 1985.

MLA (9th ed.) Citation

Pohl, Frederik. Beyond the Blue Event Horizon. 5. print. Ballantine Books, 1985.