Horn, R. E., & Shafer, R. E. (1967). Language change and communication. Science Research Associates.
Dyfyniad Arddull ChicagoHorn, Robert E., and Robert Eugene Shafer. Language Change and Communication. Chicago: Science Research Associates, 1967.
Dyfyniad MLAHorn, Robert E., and Robert Eugene Shafer. Language Change and Communication. Science Research Associates, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.