@unpublished{repository3362,
            note = {Unpublished},
           title = {BAP, Presensi, Nilai Sistem Operasi 4D},
       publisher = {Universitas Muhammadiyah PROF.DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/3362/},
          author = {Avorizano, Arry}
}