https://etd.repository.ugm.ac.id/penelitian/detail/1087382017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1087942017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1087982017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1088992017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1091272017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1135322017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1165802017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1166512017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1167412017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1326852017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1327622017never1.0https://etd.repository.ugm.ac.id/penelitian/detail/1545332017never1.0