https://etd.repository.ugm.ac.id/penelitian/detail/2515712025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2517382025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2518622025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2523322025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2528122025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2553652025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2558922025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2566112025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2637152025never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2689892025never1.0