@unpublished{repository27654,
           title = {2A KEWIRAUSAHAAN},
       publisher = {UNIVERSITAS MUHAMMADIYAH PROF. DR. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/27654/},
          author = {Eko Digdoyo, Eko}
}