https://etd.repository.ugm.ac.id/penelitian/detail/340342007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/340352007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361122007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361132007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361142007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361152007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361162007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361172007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/361182007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/372802007never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1732482007never1.0