Παραπομπή APA

Lewis, W. A. (1976). Development planning: The essentials of economic policy. George Allen.

Παραπομπή Chicago Style

Lewis, W. Arthur. Development Planning: The Essentials of Economic Policy. London: George Allen, 1976.

Παραπομπή MLA

Lewis, W. Arthur. Development Planning: The Essentials of Economic Policy. George Allen, 1976.