Παραπομπή APA

Crichton, M., Asner, E., & Polanis, J. (1987). Sphere. Ballantine Books.

Παραπομπή Chicago Style

Crichton, Michael, Edward Asner, και Jacques Polanis. Sphere. New York, NY: Ballantine Books, 1987.

Παραπομπή MLA

Crichton, Michael, et al. Sphere. Ballantine Books, 1987.