@unpublished{repository9706,
           title = {Sertifikat ASJI},
            note = {Unpublished},
            year = {2021},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
           month = {August},
             url = {http://repository.uhamka.ac.id/id/eprint/9706/},
          author = {Utari, Retno}
}