https://etd.repository.ugm.ac.id/penelitian/detail/453712010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/453722010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/469422010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/469452010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/469462010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/469482010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/469492010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/472642010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/475652010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/475662010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/475672010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/475682010never1.0https://etd.repository.ugm.ac.id/penelitian/detail/475692010never1.0