@unpublished{repository30751,
           month = {February},
          school = {Universitas Andalas},
            year = {2005},
           title = {TESIS S2},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/30751/},
          author = {Vera Ladeska, Vera}
}