https://etd.repository.ugm.ac.id/penelitian/detail/587652013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/592202013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/605302013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/606052013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/609372013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/609382013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/628202013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/634442013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/634702013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/635122013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/663692013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/664622013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/679212013never1.0