@unpublished{repository10013,
           title = {A\_Psi Bel Mat 2C Genap 2020.2021 Rizki Dwi Siswanto},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/10013/},
          author = {RIZKI DWI SISWANTO, RDS}
}