Comments on: Rilla Khaled: Participatory Approaches to Persuasive Technology http://interface.fh-potsdam.de/Gamification/speaker-rilla-khaled/ - November 11th 2011 in Potsdam. Thu, 10 Nov 2011 11:50:41 +0000 hourly 1 http://wordpress.org/?v=3.7.8