@unpublished{repository9685,
           title = {Genap 18-19 Sertifikat Pemakalah SNPM},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/9685/},
          author = {Laksanawati, Wahyu Dian}
}