Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.