@unpublished{repository13451,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.DR.HAMKA},
           title = {Bkd-metlit-02},
             url = {http://repository.uhamka.ac.id/id/eprint/13451/},
          author = {Zulherman, Zulherman}
}