1. Newspapers and practitioners differ widely on PR role;Aronoff C.;Public Relations Journal,1975
2. Public relations research 2008 VS Verlag für Sozialwissenschaften Wiesbaden Germany G. Bentele H. Nothhaft A. Zerfass B. Ruler K. Sriramesh The intereffication model: Theoretical discussions and empirical research 33 47
3. CPRS. (2008).Definition of the Canadian Public Relations Society (CPRS). Retrieved fromhttps://www.cprs.ca/about.aspx