@unpublished{repository56437,
           title = {Laporan Pengmas dr Hafidz},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
            note = {Unpublished},
            year = {2026},
          author = {Hafidz Muhammad Prodjokusumo, Hafidz},
             url = {http://repository.uhamka.ac.id/id/eprint/56437/}
}