https://etd.repository.ugm.ac.id/penelitian/detail/2387992024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2390662024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2439282024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2450052024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2457512024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2457522024never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2479462024never1.0