Cropf, R. A., & Krummenacher, W. S. (2011). Information communication technologies and the virtual public sphere: Impact of network structures on civil society. Information Science Reference.

Cropf, Robert A., and William S. Krummenacher. Information Communication Technologies and the Virtual Public Sphere: Impact of Network Structures on Civil Society. Hershey PA: Information Science Reference, 2011.

Cropf, Robert A., and William S. Krummenacher. Information Communication Technologies and the Virtual Public Sphere: Impact of Network Structures on Civil Society. Information Science Reference, 2011.