https://etd.repository.ugm.ac.id/penelitian/detail/301452006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/301462006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/301472006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/301482006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/301492006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/303642006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/304012006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/304252006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331372006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331382006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331392006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331402006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331412006never1.0https://etd.repository.ugm.ac.id/penelitian/detail/331422006never1.0