Silverman, F. H. (1995). Communication for the speechless (3rd ed.). Allyn and Bacon.
Dyfyniad Arddull ChicagoSilverman, Franklin H. Communication for the Speechless. 3rd ed. Boston: Allyn and Bacon, 1995.
Dyfyniad MLASilverman, Franklin H. Communication for the Speechless. 3rd ed. Allyn and Bacon, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.