Dyfyniad APA
Haberman, D. A., & Dolphin, H. A. (1988). Public relations: The necessary art. Iowa State University Press.
Dyfyniad Arddull Chicago
Haberman, David A., and Harry A. Dolphin. Public Relations: The Necessary Art. Ames, Iowa: Iowa State University Press, 1988.
Dyfyniad MLA
Haberman, David A., and Harry A. Dolphin. Public Relations: The Necessary Art. Iowa State University Press, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.