@unpublished{repository41850,
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
           title = {Sertifikat narasumber peluncuran buku},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/41850/},
          author = {Fitniwilis, Fitniwilis}
}