@unpublished{repository35224,
       publisher = {Uhamka},
           title = {Surat Tugas dan Sertifikat Kuliah Tamu},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/35224/},
          author = {Agustin Yumita, Agustin}
}