National Research Council (U.S.). Space Studies Board, National Academy Press (U.S.), & ebrary, Inc. (2004). Annual report 2003. National Academy Press.
Chicago-referens (17:e uppl.)National Research Council (U.S.). Space Studies Board, National Academy Press (U.S.), och Inc ebrary. Annual Report 2003. Washington, D.C.: National Academy Press, 2004.
MLA-referens (9:e uppl.)National Research Council (U.S.). Space Studies Board, et al. Annual Report 2003. National Academy Press, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.