@unpublished{repository36811,
            note = {Unpublished},
       publisher = {Universitas Muhammadiyah Prof.DR.HAMKA},
           title = {HAKI buku konsep antariksa},
             url = {http://repository.uhamka.ac.id/id/eprint/36811/},
          author = {Zulherman, Zulherman}
}