@book{justhis6756,
           title = {Beginselen van burgerlijk recht. IV: De contracten},
          author = {A. Kluyskens},
         address = {Bruxelles},
       publisher = {Standaard Boekhandel},
            year = {1952},
             url = {http://www.just-his.be/eprints/6756/}
}