@unpublished{repository31288,
       publisher = {UNIVERSITAS MUHAMMADIYAH PROF. DR. HAMKA},
            note = {Unpublished},
           title = {Laporan PUSPRESMA PTMA},
             url = {http://repository.uhamka.ac.id/id/eprint/31288/},
          author = {Eko Digdoyo, Eko}
}