Dyfyniad APA

Prevention of Deterioration Center (U.S.). Prevention of deterioration advance list. Prevention of Deterioration Center, National Research Council.

Dyfyniad Arddull Chicago

Prevention of Deterioration Center (U.S.). Prevention of Deterioration Advance List. Washington, D.C.: Prevention of Deterioration Center, National Research Council.

Dyfyniad MLA

Prevention of Deterioration Center (U.S.). Prevention of Deterioration Advance List. Prevention of Deterioration Center, National Research Council.

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