https://etd.repository.ugm.ac.id/penelitian/detail/48032000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/48612000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/48782000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/48982000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49072000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49082000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49102000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49222000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49472000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/49942000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/50162000never1.0