https://etd.repository.ugm.ac.id/penelitian/detail/107742000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/107782000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/107792000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/107802000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/107822000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/107872000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115462000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115502000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115512000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115522000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115542000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/115592000never1.0