Butterworth, C. W. Ethical and political philosophy: Charles W. Butterworth. The Cambridge Companion to Arabic philosophy.(2006).
Chicago-Zitierstil (17. Ausg.)Butterworth, Charles W. "Ethical and Political Philosophy: Charles W. Butterworth." The Cambridge Companion to Arabic Philosophy.(2006) .
MLA-Zitierstil (8. Ausg.)Butterworth, Charles W. "Ethical and Political Philosophy: Charles W. Butterworth." The Cambridge Companion to Arabic Philosophy.(2006), .
Kontuz: berrikusi erreferentzia hauek erabili aurretik.