https://etd.repository.ugm.ac.id/penelitian/detail/2736822026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2737172026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2776092026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2847102026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2848362026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2848482026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2849952026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2850352026never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2851762026never1.0