Παραπομπή APA

Lewis, W. A. (1966). Development planning: The essentials of economic policy/6e. Gerorge Allen & Unwin.

Παραπομπή Chicago Style

Lewis, W. Arthur. Development Planning: The Essentials of Economic Policy/6e. London: Gerorge Allen & Unwin, 1966.

Παραπομπή MLA

Lewis, W. Arthur. Development Planning: The Essentials of Economic Policy/6e. Gerorge Allen & Unwin, 1966.