i think wherever we come across to journalism our instant thinking is Media and its role in Politics, and especially in society. so there are many theories regarding journalism from varying point of views. Here You will find some of them:
http://www.cssforum.com.pk/css-optio...alism-t-v.html

http://www.cssforum.com.pk/css-optio...alism-t-v.html

Also visit this link on regular basis for current updates on Journalism:
http://jea.org/