Dyfyniad APA

(1979). Communication concepts and skills / Robert Hopper and Jack L. Whitehead, Jr.

Dyfyniad Arddull Chicago

Communication Concepts and Skills / Robert Hopper and Jack L. Whitehead, Jr. 1979.

Dyfyniad MLA

Communication Concepts and Skills / Robert Hopper and Jack L. Whitehead, Jr. 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.