@unpublished{repository41652,
           title = {Bukti Kinerja Zat Padat 2425},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/41652/},
          author = {Laksanawati, Wahyu Dian}
}