Cita APA (7th ed.)

Crichton, M. (1987). Sphere: A novel. Knopf.

Cita Chicago (17th ed.)

Crichton, Michael. Sphere: A Novel. New York: Knopf, 1987.

Cita MLA (8th ed.)

Crichton, Michael. Sphere: A Novel. Knopf, 1987.