@unpublished{repository17853,
            year = {2021},
       publisher = {Universitas Muhammadiyah Prof. Dr. HAMKA},
            note = {Unpublished},
           title = {SERTIFIKAT SEMINAR NASIONAL},
             url = {http://repository.uhamka.ac.id/id/eprint/17853/},
          author = {Agus Rahmadi, Agus}
}