Dyfyniad APA
ebrary, Inc. (2002). Engineering and environmental challenges: Technical symposium on earth systems engineering. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. Engineering and Environmental Challenges: Technical Symposium on Earth Systems Engineering. Washington, D.C.: National Academy Press, 2002.
Dyfyniad MLA
ebrary, Inc. Engineering and Environmental Challenges: Technical Symposium on Earth Systems Engineering. National Academy Press, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.