@unpublished{repository14494,
           title = {1.Prosiding rais-zul},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.DR.HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/14494/},
          author = {Zulherman, Zulherman}
}