APA (7th ed.) Citation

Comins, N. F., & Kaufmann, W. J. (2005). Discovering the universe (7th ed.). W.H. Freeman.

Chicago Style (17th ed.) Citation

Comins, Neil F., and William J. Kaufmann. Discovering the Universe. 7th ed. New York, NY: W.H. Freeman, 2005.

MLA (9th ed.) Citation

Comins, Neil F., and William J. Kaufmann. Discovering the Universe. 7th ed. W.H. Freeman, 2005.