Douglas, R. W., & Ellis, B. (1972). Proceedings: Amorphous materials. Wiley Interscience.
Dyfyniad Arddull ChicagoDouglas, R W., and Bryan Ellis. Proceedings: Amorphous Materials. London: Wiley Interscience, 1972.
Dyfyniad MLADouglas, R W., and Bryan Ellis. Proceedings: Amorphous Materials. Wiley Interscience, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.