Blumler, J. and M. Gurevitch (1995) The Crisis of Public Communication. London: Routledge .
2.
Lilleker, D. and R. Negrine (2002) `Professionalization: Of What? Since When? By Whom?' , Harvard International Journal of Press/Politics7: 98-103 .
3.
Negrine, R. and D. Lilleker (2002) `The Professionalization of Political Communication: Continuities and Change in Media Practices' , European Journal of Communication17: 305-323 .
