@unpublished{repository28248,
            note = {Unpublished},
           title = {TSF2-2021},
             url = {http://repository.uhamka.ac.id/id/eprint/28248/},
          author = {Nining, Nining and Gusmayadi, Inding and Widayanti, Ari and Sjahid, Landyyun Rahmawan}
}