@unpublished{repository3188,
            note = {Unpublished},
           title = {Surat Tugas Pengabdian (PDF)},
       publisher = {Universitas Muhammadiyah Prof. DR HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/3188/},
          author = {Utari, Retno}
}