APA استشهاد

Lewis, W. (1955). Theory of economic growth. George Allen & Unwin.

استشهاد بنمط شيكاغو

Lewis, W.Arthur. Theory of Economic Growth. London: George Allen & Unwin, 1955.

MLA استشهاد

Lewis, W.Arthur. Theory of Economic Growth. George Allen & Unwin, 1955.