https://etd.repository.ugm.ac.id/penelitian/detail/28372000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/29632000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/29812000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/31922000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/31952000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/32042000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/32072000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/34232000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/34482000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/36912000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/36942000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/36992000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/39442000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/39632000never1.0