@unpublished{repository3707,
           title = {Aritmatika 6B 27-8-2020},
            note = {Unpublished},
       publisher = {FKIP UHAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/3707/},
          author = {Purwanto, Sigid Edy}
}