@unpublished{repository10014,
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
           title = {A\_Psi Bel Mat 2D Genap 2020.2021 Rizki Dwi Siswanto},
            note = {Unpublished},
          author = {RIZKI DWI SISWANTO, RDS},
             url = {http://repository.uhamka.ac.id/id/eprint/10014/}
}