https://etd.repository.ugm.ac.id/penelitian/detail/614722013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/615222013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/615232013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/615632013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/619092013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/640552013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/640562013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/641972013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/642192013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/643322013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/643392013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/643712013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/643772013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/644282013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/644292013never1.0