Dyfyniad APA

Cutlip, S. M., & Center, A. H. (1964). Effective public relations/3e (3rd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Cutlip, Scott M., and Allen H. Center. Effective Public Relations/3e. 3rd ed. New Jersey: Prentice Hall, 1964.

Dyfyniad MLA

Cutlip, Scott M., and Allen H. Center. Effective Public Relations/3e. 3rd ed. Prentice Hall, 1964.

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