https://etd.repository.ugm.ac.id/penelitian/detail/505152011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/507432011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/516772011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/518722011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/526042011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/527242011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/528822011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/530112011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/530382011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/530742011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/532042011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/535892011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/536322011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/537452011never1.0https://etd.repository.ugm.ac.id/penelitian/detail/537482011never1.0