APA استشهاد

Lewis, W. A. (1966). Development Planning: Essentials of Economic Policy. Allen & Unwin.

استشهاد بنمط شيكاغو

Lewis, W Arthur. Development Planning: Essentials of Economic Policy. London: Allen & Unwin, 1966.

MLA استشهاد

Lewis, W Arthur. Development Planning: Essentials of Economic Policy. Allen & Unwin, 1966.