Dyfyniad APA

National Academy of Sciences (U.S.). (1991). Biographical memoirs. National Academy Press.

Dyfyniad Arddull Chicago

National Academy of Sciences (U.S.). Biographical Memoirs. Washington, D.C.: National Academy Press, 1991.

Dyfyniad MLA

National Academy of Sciences (U.S.). Biographical Memoirs. National Academy Press, 1991.

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