@unpublished{repository47482,
           title = {SK PEMBIMBING SKRIPSI - PBI 1},
       publisher = {Universitas Muhammadiyah Prof. Dr. HAMKA},
            note = {Unpublished},
             url = {http://repository.uhamka.ac.id/id/eprint/47482/},
          author = {Ma'mun, Akhmad}
}