@unpublished{repository1926,
            type = {Documentation},
           title = {surat und, tugas, materi sma 108 juni 2019},
       publisher = {MM Uhamka},
            note = {Unpublished},
          author = {Bambang, Dwi Hartono},
             url = {http://repository.uhamka.ac.id/id/eprint/1926/}
}