https://etd.repository.ugm.ac.id/penelitian/detail/2702582026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2711922026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2712002026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2712332026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2713182026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2713192026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2713342026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2714972026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2715492026never1.0