@unpublished{repository1992,
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
            note = {Unpublished},
           title = {Modul Praktikum Kimia Organik 1},
             url = {http://repository.uhamka.ac.id/id/eprint/1992/},
          author = {Rachmania, Rizky Arcinthya}
}