Volker., W., Heidemarie., H.(2011).New forms of collaborative innovation and production on the Internet:an interdisciplinary perspective .Gottingen, Germany:universitätsverlag göttingen.
Gaya MLA
Wittke, Volker.., Hanekop, Heidemarie.."New forms of collaborative innovation and production on the Internet:an interdisciplinary perspective".Gottingen, Germany:universitätsverlag göttingen,2011.Electronic Resource.