Dyfyniad APA

National Academy of Sciences (U.S.) & ebrary, Inc. (1999). Biographical memoirs. National Academy Press.

Dyfyniad Arddull Chicago

National Academy of Sciences (U.S.) and Inc ebrary. Biographical Memoirs. Washington, D.C.: National Academy Press, 1999.

Dyfyniad MLA

National Academy of Sciences (U.S.) and Inc ebrary. Biographical Memoirs. National Academy Press, 1999.

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