National Research Council (U.S.). Space Studies Board, National Academy Press (U.S.), & ebrary, Inc. (2002). Annual report 2001. National Academy Press.
Ondo kopiatu da
Kopiatzeak huts egin du
Chicago Style (17th ed.) Zitazioa
National Research Council (U.S.). Space Studies Board, National Academy Press (U.S.), eta Inc ebrary. Annual Report 2001. Washington, D.C.: National Academy Press, 2002.
Ondo kopiatu da
Kopiatzeak huts egin du
MLA (9th ed.) Zitazioa
National Research Council (U.S.). Space Studies Board, et al. Annual Report 2001. National Academy Press, 2002.
Ondo kopiatu da
Kopiatzeak huts egin du
Kontuz: berrikusi erreferentzia hauek erabili aurretik.