6McCombs,M.E. ,and Shaw ,D.L. (1972). The Agenda- Setting Function of Mass Media. Public Opinion Quarterly
7Brewer, M. and McCombs, M. E. (1996). Setting the community agenda. Journalism and Mass Communication Quarterly
8Cappella, J. W. &Jamieson, K. H. (1997). Spiral of Cyracism: The Press and the Public Good. NY: Ox ford University press
9Terkildsen, N.; Schnell, F. I.; &Ling; C. (1998). Interest groups,the media, and policy debate formation:analysis of massage structure, rhetoric, and source cues. Political Communication
