Arny, T. (2004). Explorations: Stars, galaxies, and planets (Updated ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)Arny, Thomas. Explorations: Stars, Galaxies, and Planets. Updated ed. Boston: McGraw-Hill, 2004.
Cita MLA (8a ed.)Arny, Thomas. Explorations: Stars, Galaxies, and Planets. Updated ed. McGraw-Hill, 2004.
Precaución: Estas citas no son 100% exactas.