Capp, G. R. (1971). Basic oral communication. Prentice-Hall.
Dyfyniad Arddull ChicagoCapp, Glenn Richard. Basic Oral Communication. Englewood Cliffs, N.J: Prentice-Hall, 1971.
Dyfyniad MLACapp, Glenn Richard. Basic Oral Communication. Prentice-Hall, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.