https://etd.repository.ugm.ac.id/penelitian/detail/280362005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/280422005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/280432005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/280442005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/285132005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/285162005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/287072005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/291632005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/291642005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/291652005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/291662005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/291672005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/292782005never1.0https://etd.repository.ugm.ac.id/penelitian/detail/301702005never1.0