GLADSTONE, J. Mechanical Estimating Guide Book John Gladstone, Kenneth K. Humphreys. McGraw-Hill.
Dyfyniad Arddull ChicagoGLADSTONE, John. Mechanical Estimating Guide Book John Gladstone, Kenneth K. Humphreys. McGraw-Hill.
Dyfyniad MLAGLADSTONE, John. Mechanical Estimating Guide Book John Gladstone, Kenneth K. Humphreys. McGraw-Hill.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.