2Webster's New Twentieth Century Dictionary,unabridged, 2nd Will-Collins and World Pubblishing Co. ,Inc. 1976.
3Doug Newsom Alan Scott Judy Vanslyke Turk ,"This Is PR:The Realities Of Public Relations"--5^th ed. , Wadsworth Publishing Company, 1992.
4Edward L. Bernays,Public Relations[M]. Norman :University of Oklahoma Press,1952.
5Scott M. Cut Lip & A. H. Center. Effective Public Relations Prentice Hall, 1952.
6Frank Jerkins. Public Relations, Hazell Watson&Viney Ltd, 1983.
7John E. Marston. The Nature of Public Relations[M]. New York : McGraw-Hill, 1963.
8James E. Gruning. What Kind of Public Relations Do You Practice ? New Theory of Public Relations Presents Four Models, pr reporter, 27,purview (April 9,1984).
