https://etd.repository.ugm.ac.id/penelitian/detail/2195492023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2199222023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2204162023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2205242023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2205792023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2212202023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2218962023never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2234662023never1.0