https://etd.repository.ugm.ac.id/penelitian/detail/2022812021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2023672021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2023902021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2024102021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2024802021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2024842021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2024962021never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2025552021never1.0