https://etd.repository.ugm.ac.id/penelitian/detail/234012004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/234022004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/243792004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/243802004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/243812004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/255412004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/258482004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/258492004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/258502004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/262752004never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2728372004never1.0