@unpublished{repository39956,
           title = {Bukti Ajar MK Konsep Dasar IPS 1E},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/39956/},
          author = {Sulaeman, Sulaeman}
}