Dyfyniad APA

ebrary, Inc. (1995). Effects of past global change on life. National Academy Press.

Dyfyniad Arddull Chicago

ebrary, Inc. Effects of Past Global Change on Life. Washington, D.C.: National Academy Press, 1995.

Dyfyniad MLA

ebrary, Inc. Effects of Past Global Change on Life. National Academy Press, 1995.

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