Dyfyniad APA
ebrary, Inc. (1990). Sea-level change. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. Sea-level Change. Washington, D.C.: National Academy Press, 1990.
Dyfyniad MLA
ebrary, Inc. Sea-level Change. National Academy Press, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.