https://etd.repository.ugm.ac.id/penelitian/detail/2241942023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2243752023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2292592023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2294112023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2296322023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2329892023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2331712023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2332902023never1.0