@unpublished{repository48120,
           title = {Bukti prak ento 6B dan 6C},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/48120/},
          author = {Nikmatullah, Nurul Azmah}
}