@unpublished{repository2462,
           title = {BERITA ACARA, ABSEN DAN NILAI},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/2462/},
          author = {Suyadi, Suyadi}
}