Cita APA (7a ed.)

Fix, J. D. (2011). Astronomy: Journey to the cosmic frontier (6th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Fix, John D. Astronomy: Journey to the Cosmic Frontier. 6th ed. New York: McGraw-Hill, 2011.

Cita MLA (9a ed.)

Fix, John D. Astronomy: Journey to the Cosmic Frontier. 6th ed. McGraw-Hill, 2011.