@unpublished{repository7386,
            note = {Unpublished},
           title = {Teach Sec. Math in English 3A},
       publisher = {Universitas Muhammadiyah Prof DR HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/7386/},
          author = {Subhan Ajiz, Awalludin}
}