@unpublished{repository20915,
           title = {SK Mengajar, BAP, Absensi dan Nilai Problematik Matematika Sekolah Kelas 7D},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/20915/},
          author = {Hadi, Windia Hadi}
}