@unpublished{repository50114,
       publisher = {Universitas Muhammadiyah Prof. DR. Hamka},
           title = {PENGURUS KAMPOENG MATEMATIKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/50114/},
          author = {Benny, Hendriana}
}