6Brodock K, Joyce M, Zaeck T. Digital activism survey report 2009 [ J ]. [ 2009 - 22 ]. http ://www. digiactive, org/wpcontent/ uploads/Researeh4_SurveyReport2009, pdf.
7Stand,2009,22. Canunaerts B N. Carpentier(Eds). Activism and media[ M ]. U- niversity of Chicago Press,2007.
8Obar J A,Zube P,Lampe C. Advocacy 2.0 : An analysis of how advocacy groups in the United States perceive and use social media as tools for facilitating civic engagement and collective ac- tion[ J]. Journal of Information Policy ,2012(2 ) : 1-25.
