https://etd.repository.ugm.ac.id/penelitian/detail/503432011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509272011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509282011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509292011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509302011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509322011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509342011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509352011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509362011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509372011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509382011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509392011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/509402011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/518992011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/519012011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/530532011never1.0