@unpublished{repository25470,
            year = {2013},
          school = {UNIVERSITAS ANDALAS},
            note = {Unpublished},
           title = {Tesis Nurhasnah},
             url = {http://repository.uhamka.ac.id/id/eprint/25470/},
          author = {Arifin, helmi and widia murni, arina and nurhasnah, nurhasnah}
}