@unpublished{repository45076,
           title = {ST\_Sertif\_Semnas\_Toxic},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/45076/},
          author = {Lestari, Melina}
}