@unpublished{repository3191,
           title = {Surat Tugas Webinar Grafologi (PDF)},
       publisher = {Universitas Muhammadiyah Prof. DR HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/3191/},
          author = {Utari, Retno}
}