Cita APA (7th ed.)

Fix, J. D. (1995). Astronomy: Journey to the cosmic frontier. Mosby.

Cita Chicago (17th ed.)

Fix, John D. Astronomy: Journey to the Cosmic Frontier. St. Louis: Mosby, 1995.

Cita MLA (8th ed.)

Fix, John D. Astronomy: Journey to the Cosmic Frontier. Mosby, 1995.