@unpublished{repository51900,
           title = {PPN-3I-SK-BAP-HADIR-NILAI},
       publisher = {Universitas Muhammadiyah Prof.Dr.HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/51900/},
          author = {Heriansyah, Daram}
}