@unpublished{repository27884,
            note = {Unpublished},
           title = {ST dan Sertif Visiting Lecture},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/27884/},
          author = {Rr., Sulistyawati}
}