https://etd.repository.ugm.ac.id/penelitian/detail/2524312025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2525032025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2525202025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2619542025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2621372025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2627172025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2627342025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2628942025never1.0