@unpublished{repository35878,
           title = {ST, Sertifikat, PPT Presenter},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/35878/},
          author = {Sulistyawati, Sulistyawati}
}