Penn, W. (1966). GRP technology: Handbook to the polyester/glass fibre plastics industry. Maclaren.
Dyfyniad Arddull ChicagoPenn, W.S. GRP Technology: Handbook to the Polyester/glass Fibre Plastics Industry. London: Maclaren, 1966.
Dyfyniad MLAPenn, W.S. GRP Technology: Handbook to the Polyester/glass Fibre Plastics Industry. Maclaren, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.