@unpublished{repository6955,
           title = {BAP,Presensi,Nilai Sistem Penukar Panas},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/6955/},
          author = {Rifky, Rifky}
}