@unpublished{repository20143,
           title = {Surat Tugas dan Jadwal PPG},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/20143/},
          author = {Mayarni, Mayarni}
}