https://etd.repository.ugm.ac.id/penelitian/detail/2442012000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2442022000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2442032000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2442052000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2446752000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2767852000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2767882000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2767902000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2767952000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2768002000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/2768792000never1.0