Cita APA (7th ed.)
Zimmerman, R. (2003). Leaving earth: Space stations, rival superpowers, and the quest for interplanetary travel. Joseph Henry Press.
Cita Chicago (17th ed.)
Zimmerman, Robert. Leaving Earth: Space Stations, Rival Superpowers, and the Quest for Interplanetary Travel. Washington, District of Columbia: Joseph Henry Press, 2003.
Cita MLA (9th ed.)
Zimmerman, Robert. Leaving Earth: Space Stations, Rival Superpowers, and the Quest for Interplanetary Travel. Joseph Henry Press, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.