Cita APA (7th ed.)

Croswell, K. (1997). Planet quest: The epic discovery of alien solar systems. Free Press.

Cita Chicago (17th ed.)

Croswell, Ken. Planet Quest: The Epic Discovery of Alien Solar Systems. New York: Free Press, 1997.

Cita MLA (8th ed.)

Croswell, Ken. Planet Quest: The Epic Discovery of Alien Solar Systems. Free Press, 1997.