Lewis, W. (1955). Theory of economic growth. George Allen & Unwin.
Chicago Style aipamenaLewis, W.Arthur. Theory of Economic Growth. London: George Allen & Unwin, 1955.
MLA aipamenaLewis, W.Arthur. Theory of Economic Growth. George Allen & Unwin, 1955.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.