https://etd.repository.ugm.ac.id/penelitian/detail/577602013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/583332013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/583712013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/588532013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/589752013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/590512013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/593492013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/593922013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/603012013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/603512013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/606872013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/639132013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/641332013never1.0https://etd.repository.ugm.ac.id/penelitian/detail/679802013never1.0