@unpublished{repository44990,
           title = {sk mengajar metlit 4C},
       publisher = {Universitas Muhammadiyah Prof.DR.HAMKA},
            note = {Unpublished},
          author = {Zulherman, Zulherman},
             url = {http://repository.uhamka.ac.id/id/eprint/44990/}
}