Paul R. Weissman & Torrence V. Jonhnon. (2007). Encyclopedia of the solar system (2nd ed.). Academic Press.
Cita Chicago (17th ed.)Paul R. Weissman i Torrence V. Jonhnon. Encyclopedia of the Solar System. 2nd ed. Amsterdam, Boston: Academic Press, 2007.
Cita MLA (9th ed.)Paul R. Weissman i Torrence V. Jonhnon. Encyclopedia of the Solar System. 2nd ed. Academic Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.