@unpublished{repository31484,
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
            note = {Unpublished},
           title = {Bukti Ajar SIM 2},
             url = {http://repository.uhamka.ac.id/id/eprint/31484/},
          author = {Hamid Al Jufri, Jufri}
}