(1974). Dictionary of science and technology. W & R. Chambers.
Dyfyniad Arddull ChicagoDictionary of Science and Technology. Edinburgh: W & R. Chambers, 1974.
Dyfyniad MLADictionary of Science and Technology. W & R. Chambers, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.