@unpublished{repository10259,
            note = {Unpublished},
            year = {2021},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
           title = {Sertifikat PBL},
           month = {August},
             url = {http://repository.uhamka.ac.id/id/eprint/10259/},
          author = {Sukmara, Rina}
}