https://etd.repository.ugm.ac.id/penelitian/detail/610782013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/610792013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/614932013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/614942013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/617452013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/617462013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/617472013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/641282013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/641352013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/648772013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/652952013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/652962013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/653842013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/654702013never1.0