?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Heuvel&rft.au=Heuvel%2C+C.+van+den&rft.aufirst=C.+van+den&rft.date=2019&rft.degree=Master&rft.title=Influencing+subconscious+behaviour+to+reduce+litter+in+public+space+in+the+Northern+Netherlands