Dyfyniad APA

Gregory, A. (2000). The art and science of public relations: Public relations in practoice. Crest publishing house.

Dyfyniad Arddull Chicago

Gregory, Anne. The Art and Science of Public Relations: Public Relations in Practoice. New Delhi: Crest publishing house, 2000.

Dyfyniad MLA

Gregory, Anne. The Art and Science of Public Relations: Public Relations in Practoice. Crest publishing house, 2000.

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