https://etd.repository.ugm.ac.id/penelitian/detail/2701102026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2704272026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2705012026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2705372026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2705492026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2707932026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2710462026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2712012026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2713962026never1.0