@unpublished{repository6420,
           title = {Absen, BAP, Nilai Toksikologi},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
             url = {http://repository.uhamka.ac.id/id/eprint/6420/},
          author = {Zainul Islam, ZI}
}