APA-referens (7:e uppl.)

Zeilik, M. (2002). Astronomy: The evolving universe (Ninth edition.). Cambridge University Press.

Chicago-referens (17:e uppl.)

Zeilik, Michael. Astronomy: The Evolving Universe. Ninth edition. New York: Cambridge University Press, 2002.

MLA-referens (9:e uppl.)

Zeilik, Michael. Astronomy: The Evolving Universe. Ninth edition. Cambridge University Press, 2002.