TED Talks: Derek Sivers, How to start a movement Door Wim Pelgrim | 1 mei 2010 - 05:00 |1 mei 2010 Videoarchief http://www.ted.com/talks/derek_sivers_how_to_start_a_movement.html Getagd Derek Sivers, How to start a movement, TED, video. Bladwijzer de permalink.