?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Os&rft.au=Os%2C+I.J.O.+van&rft.aufirst=I.J.O.+van&rft.date=2013&rft.degree=Bachelor&rft.title=Energie+steken+in+sportsponsoring