Welker, M. 2008. Review: Ullrich Dittler, Michael Kindt & Christine Schwarz (Eds.) (2007). Online-Communities als soziale Systeme. Wikis, Weblogs und Social Software im E-Learning [Online-Communities as Social Systems: Wikis, Weblogs and Social Software in E-Learning]. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research. 9, 1 (Jan. 2008). DOI:https://doi.org/10.17169/fqs-9.1.370.