?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Visser&rft.au=Visser%2C+G&rft.aufirst=G&rft.date=2010&rft.title=Rolmodellen+voor+startende+ondernemers&rft.degree=Master