National Research Council (U.S.). Space Studies Board & ebrary, Inc. (2001). Annual report 2000. National Academy Press.
Lua i Stíl Chicago (17ú heag.)National Research Council (U.S.). Space Studies Board agus Inc ebrary. Annual Report 2000. Washington, D.C.: National Academy Press, 2001.
Lua MLA (9ú heag.)National Research Council (U.S.). Space Studies Board agus Inc ebrary. Annual Report 2000. National Academy Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.