@unpublished{repository1983,
           title = {BAP, Absen dan Nilai Kimia Analisis 2D},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/1983/},
          author = {Rachmania, Rizky Arcinthya}
}