?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=A.N.&rft.au=Walinga%2C+A.N.&rft.aulast=Walinga&rft.title=Trainingsparticipatie+van+Europese+zzp%E2%80%99ers&rft.tpages=58&rft.date=2020&rft.degree=Master