@unpublished{repository25959,
           title = {Designing reading materials for telecommunication engineering},
            year = {2010},
          school = {Universitas Muhammadiyah Prof. Dr. Hamka},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/25959/},
          author = {ILYAS, HAMZAH PUADI}
}