Dyfyniad APA

National Research Council (U.S.). Space Studies Board & ebrary, Inc. (2001). Annual report 2000. National Academy Press.

Dyfyniad Arddull Chicago

National Research Council (U.S.). Space Studies Board and Inc ebrary. Annual Report 2000. Washington, D.C.: National Academy Press, 2001.

Dyfyniad MLA

National Research Council (U.S.). Space Studies Board and Inc ebrary. Annual Report 2000. National Academy Press, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.