APA (7th ed.) Citation

Green, S. R. (2015). Forces from beyond (Ace mass-market edition.). Ace Books.

Chicago Style (17th ed.) Citation

Green, Simon R. Forces from Beyond. Ace mass-market edition. New York: Ace Books, 2015.

MLA (8th ed.) Citation

Green, Simon R. Forces from Beyond. Ace mass-market edition. Ace Books, 2015.

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