@unpublished{repository37343,
           title = {Bukti Ajar Matematika Dasar},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof DR Hamka},
          author = {Wahidin, M. Pd.},
             url = {http://repository.uhamka.ac.id/id/eprint/37343/}
}