APA (7th ed.) Citation

Crichton, M. (2011). Sphere (1st Harper ed.). Harpercollins.

Chicago Style (17th ed.) Citation

Crichton, Michael. Sphere. 1st Harper ed. New York: Harpercollins, 2011.

MLA (8th ed.) Citation

Crichton, Michael. Sphere. 1st Harper ed. Harpercollins, 2011.

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