Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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