https://etd.repository.ugm.ac.id/penelitian/detail/372832008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/372842008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/372852008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/374912008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/375022008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/375092008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/384252008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/384262008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/384272008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/384282008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/384292008never1.0https://etd.repository.ugm.ac.id/penelitian/detail/405992008never1.0