1. Public Relations: What Research Tells Us;Pavlik,1987
2. Managing Public Relations;Grunig,1984
3. James E. Grunig & Larissa S. Grunig, “Application of Open Systems Theory To Public Relations: Review of a Program of Research”, paper presented at the meeting of the International Communication Association, Chicago, May 1986, p. 44.
4. Sally McMillan, “Public Relations in Trade and Professional Associations: Location, Model, Structure, Environment, and Values”, paper presented at the meeting of the International Communication Association, Chicago, May 1986, P. 2.
5. Sally McMillan, “Public Relations in Trade and Professional Associations: Location, Model, Structure, Environment, and Values”, paper presented at the meeting of the International Communication Association, Chicago, May 1986, P. 44.