https://etd.repository.ugm.ac.id/penelitian/detail/1682182019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1691272019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1692702019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1695062019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1767952019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1777182019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1780562019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1793142019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1794042019never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1798322019never1.0