Wilcox, D. L., Agee, W. K., & Ault, P. H. (1995). Public relations: Strategies and tactics (4th ed.). HarperCollins.
Dyfyniad Arddull ChicagoWilcox, Dennis L., Warren K. Agee, and Philip H. Ault. Public Relations: Strategies and Tactics. 4th ed. New York: HarperCollins, 1995.
Dyfyniad MLAWilcox, Dennis L., et al. Public Relations: Strategies and Tactics. 4th ed. HarperCollins, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.