@unpublished{repository7371,
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
           title = {BAP, Presensi, Nilai Konservasi SDA 5F},
            note = {Unpublished},
          author = {Amirullah, Gufron},
             url = {http://repository.uhamka.ac.id/id/eprint/7371/}
}