@unpublished{repository36651,
            note = {Unpublished},
           title = {SERTIFIKAT NARA SUMBER},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/36651/},
          author = {Fitniwilis, Fitniwilis}
}