LEWIS, W. A. (1966). Development planning: The essentials of economic policy. Allen & Unwin.
Cita Chicago (17th ed.)LEWIS, W. Arthur. Development Planning: The Essentials of Economic Policy. London: Allen & Unwin, 1966.
Cita MLA (9th ed.)LEWIS, W. Arthur. Development Planning: The Essentials of Economic Policy. Allen & Unwin, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.