@unpublished{repository37446,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. Dr. HAMKA},
           title = {Laporan Penelitian Eksplorasi},
             url = {http://repository.uhamka.ac.id/id/eprint/37446/},
          author = {AKHMAD, Haqiqi}
}