@unpublished{repository5502,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof Dr HAMKA},
           title = {Pengembangan Bahan Ajar Materi Induksi Matematika dan teori bilangan berbasis Pembuktian},
             url = {http://repository.uhamka.ac.id/id/eprint/5502/},
          author = {Hikmatul Khusna, HK}
}