@unpublished{repository46943,
           title = {Surat Tugas dan Sertifikat HKI Pop Up Book},
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof. Dr. Hamka},
             url = {http://repository.uhamka.ac.id/id/eprint/46943/},
          author = {Handayani, Sri Lestari}
}