@unpublished{repository50342,
           title = {Srtifikat Badan Bahasa Kuliah Kebahasaan},
       publisher = {Universitas Muhammadiyah Prof. Dr. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/50342/},
          author = {sri mulyani, Sri}
}