@unpublished{repository6331,
           title = {Modul Praktikum Instrumen},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/6331/},
          author = {Fatmawati, Sofia and Supandi Supandi, Supandi and Almawati Situmorang, Almawati}
}