Dyfyniad APA

Weilbacher, W. M. (1983). Choosing an advertising agency. National Textbook Co.

Dyfyniad Arddull Chicago

Weilbacher, William M. Choosing an Advertising Agency. Lincolnwood, Ill: National Textbook Co, 1983.

Dyfyniad MLA

Weilbacher, William M. Choosing an Advertising Agency. National Textbook Co, 1983.

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