Dyfyniad APA

Howard, C. (1979). Contact: A textbook in apllied communications (3rd.). Prentice Hall.

Dyfyniad Arddull Chicago

Howard, C. Contact: A Textbook in Apllied Communications. 3rd. New Jersey: Prentice Hall, 1979.

Dyfyniad MLA

Howard, C. Contact: A Textbook in Apllied Communications. 3rd. Prentice Hall, 1979.

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