@unpublished{repository48115,
           title = {Bukti ento 6A},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
            note = {Unpublished},
          author = {Nikmatullah, Nurul Azmah},
             url = {http://repository.uhamka.ac.id/id/eprint/48115/}
}