@unpublished{repository50988,
            note = {Unpublished},
           title = {Surat Tugas dan Sertifikat Pembicara},
       publisher = {FEB UHAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/50988/},
          author = {Irsyad Ali Amin, Irsyad}
}