3Marcus Messner and Marcia Watson DiStaso.The Source Cycle:How traditional media and webblogs use each other as sources.Journalism Stdudies,Volume9,Numeber4,June 2008,pp:447-463.
4Ann Cooper.The Bigger Tent:Forget Who is a journalist,the important question is:What is journalism.Columbia Journatism Review,Septemper/October,2008,pp:45-47.