ISI. (1980). IS: VISCOSITY CLASSIFICATION FOR INDUSTRIAL LIQUID LUBRICANTS IS : 9466-1980. ISI.
Dyfyniad Arddull ChicagoISI. IS: VISCOSITY CLASSIFICATION FOR INDUSTRIAL LIQUID LUBRICANTS IS : 9466-1980. NEW DELHI: ISI, 1980.
Dyfyniad MLAISI. IS: VISCOSITY CLASSIFICATION FOR INDUSTRIAL LIQUID LUBRICANTS IS : 9466-1980. ISI, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.