Griffin, E. (1997). A first look at communication theory (3rd ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoGriffin, Em. A First Look at Communication Theory. 3rd ed. New York: McGraw-Hill, 1997.
Dyfyniad MLAGriffin, Em. A First Look at Communication Theory. 3rd ed. McGraw-Hill, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.