@unpublished{repository47906,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. DR. HAMKA},
           title = {SK PEMBIMBING SKRIPSI PRODI FISIKA},
             url = {http://repository.uhamka.ac.id/id/eprint/47906/},
          author = {Martin, Martin}
}