APA (7th ed.) Citation

Crichton, M. (1987). Sphere: A novel. Ballantine Books.

Chicago Style (17th ed.) Citation

Crichton, Michael. Sphere: A Novel. New York: Ballantine Books, 1987.

MLA (9th ed.) Citation

Crichton, Michael. Sphere: A Novel. Ballantine Books, 1987.

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