Snow, T. P. (1987). Essentials of the dynamic universe: An introduction to astronomy (2nd ed.). West Pub. Co..
Chicago-referens (17:e uppl.)Snow, Theodore P. Essentials of the Dynamic Universe: An Introduction to Astronomy. 2nd ed. St. Paul: West Pub. Co., 1987.
MLA-referens (9:e uppl.)Snow, Theodore P. Essentials of the Dynamic Universe: An Introduction to Astronomy. 2nd ed. West Pub. Co., 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.