@unpublished{repository7813,
       publisher = {Universitas Muhammadiyah Prof. DR. Hamka},
           title = {SK Mengajar dan Nilai PPG B. Inggris},
            note = {Unpublished},
          author = {Tri Wintolo Apoko, Tri},
             url = {http://repository.uhamka.ac.id/id/eprint/7813/}
}