Dyfyniad APA

Covino, W. A., & Jolliffe, D. A. (1995). Rhetoric: Concepts, definitions, boundaries. Allyn and Bacon.

Dyfyniad Arddull Chicago

Covino, William A., and David A. Jolliffe. Rhetoric: Concepts, Definitions, Boundaries. Boston: Allyn and Bacon, 1995.

Dyfyniad MLA

Covino, William A., and David A. Jolliffe. Rhetoric: Concepts, Definitions, Boundaries. Allyn and Bacon, 1995.

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