https://etd.repository.ugm.ac.id/penelitian/detail/1483602012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1484552012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1485322012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1485562012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1490392012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1495112012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1496692012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1496712012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1496742012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1497192012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1497372012never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1501242012never1.0