@unpublished{repository39787,
       publisher = {UHAMKA},
           title = {Sertifikat PKM dari Universitas},
            note = {Unpublished},
          author = {Tri Widiastuti, Haning and Tri Widiastuti, Haning and WIdiastuti, Haning Tri},
             url = {http://repository.uhamka.ac.id/id/eprint/39787/}
}