@unpublished{repository34057,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.DR.HAMKA},
           title = {konsep dasar ipa 2.},
             url = {http://repository.uhamka.ac.id/id/eprint/34057/},
          author = {Zulherman, Zulherman}
}