APA (7th ed.) Citation

Pohl, F. (1980). Beyond the blue event horizon. Ballantine Books.

Chicago Style (17th ed.) Citation

Pohl, Frederik. Beyond the Blue Event Horizon. New York: Ballantine Books, 1980.

MLA (9th ed.) Citation

Pohl, Frederik. Beyond the Blue Event Horizon. Ballantine Books, 1980.

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