@unpublished{repository4889,
           title = {Peer},
         address = {Jakarta, Indonesia},
            note = {Unpublished},
            year = {2020},
       publisher = {(mandiri)},
           month = {December},
             url = {http://repository.uhamka.ac.id/id/eprint/4889/},
          author = {Oemar, Hamed and Mansyur, Muchtaruddin}
}