@unpublished{repository37253,
            note = {Unpublished},
           title = {bukti ajar metodologi SI},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/37253/},
          author = {Hamid Al Jufri, Jufri}
}