@unpublished{repository31401,
           title = {Berkas Pekerti Baru},
            note = {Unpublished},
       publisher = {UNIVERSITAS MUHAMMADIYAH PROF. DR. HAMKA},
          author = {Eko Digdoyo, Eko},
             url = {http://repository.uhamka.ac.id/id/eprint/31401/}
}