@unpublished{repository37220,
           title = {Sertifikat SMPN 130},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof DR Hamka},
          author = {Awalludin, Subhan Ajiz},
             url = {http://repository.uhamka.ac.id/id/eprint/37220/}
}