Dyfyniad APA
ebrary, Inc. (1999). Risk assessment of radon in drinking water. National Academy Press.
Dyfyniad Arddull Chicago
ebrary, Inc. Risk Assessment of Radon in Drinking Water. Washington, DC: National Academy Press, 1999.
Dyfyniad MLA
ebrary, Inc. Risk Assessment of Radon in Drinking Water. National Academy Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.