Cita APA (7th ed.)
National Research Council (U.S.). Space Studies Board. Committee on Human Exploration & ebrary, Inc. (1997). The human exploration of space. National Academy Press.
Cita Chicago (17th ed.)
National Research Council (U.S.). Space Studies Board. Committee on Human Exploration i Inc ebrary. The Human Exploration of Space. Washington, D.C.: National Academy Press, 1997.
Cita MLA (9th ed.)
National Research Council (U.S.). Space Studies Board. Committee on Human Exploration i Inc ebrary. The Human Exploration of Space. National Academy Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.