Dyfyniad APA

LUCAS, S. E. 1. (2007). The art of public speaking (9th. Ed.). Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

LUCAS, Stephen E 1946-. The Art of Public Speaking. 9th. Ed. Boston: McGraw-Hill, 2007.

Dyfyniad MLA

LUCAS, Stephen E 1946-. The Art of Public Speaking. 9th. Ed. Boston: McGraw-Hill, 2007.

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