Cita APA (7a ed.)
Abell, G. O., Marrison, D., & Wolff, S. C. (1992). Realm of the Universe (5th ed.). Saunders College.
Cita Chicago Style (17a ed.)
Abell, George O., David Marrison, y Sidney C. Wolff. Realm of the Universe. 5th ed. New York: Saunders College, 1992.
Cita MLA (9a ed.)
Abell, George O., et al. Realm of the Universe. 5th ed. Saunders College, 1992.
Precaución: Estas citas no son 100% exactas.