@unpublished{repository22899,
           title = {Korespondensi PSR Hariyanti},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR HAMKA},
          author = {Hariyanti, Hariyanti},
             url = {http://repository.uhamka.ac.id/id/eprint/22899/}
}