@unpublished{repository54876,
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
           title = {Bukti ajar Sosio 2b},
            note = {Unpublished},
          author = {Hamid Al Jufri, Jufri},
             url = {http://repository.uhamka.ac.id/id/eprint/54876/}
}