Dyfyniad APA

Cutlip, S. M. (2005). Effective public relations (8th ed.). Pearson education.

Dyfyniad Arddull Chicago

Cutlip, Scott M. Effective Public Relations. 8th ed. Singapore: Pearson education, 2005.

Dyfyniad MLA

Cutlip, Scott M. Effective Public Relations. 8th ed. Pearson education, 2005.

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