Arny, T. (2004). Explorations: Stars, galaxies, and planets (Updated ed.). McGraw-Hill.
Čikaški stil citiranja (17. izdanje)Arny, Thomas. Explorations: Stars, Galaxies, and Planets. Updated ed. Boston: McGraw-Hill, 2004.
MLA način citiranja (8. izdanje)Arny, Thomas. Explorations: Stars, Galaxies, and Planets. Updated ed. McGraw-Hill, 2004.
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