@unpublished{repository3880,
           title = {Bahan Ajar Statistik Non Parametrik},
       publisher = {Universitas Muhammadiyah Prof DR HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/3880/},
          author = {Tri Mawartinah, Trimawartinah}
}