Wormald, J. R. (1973). Diffraction methods. Oxford: Clarendon Press.
Dyfyniad Arddull ChicagoWormald, John Roger. Diffraction Methods. Oxford: Clarendon Press, 1973.
Dyfyniad MLAWormald, John Roger. Diffraction Methods. Oxford: Clarendon Press, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.