Lewis, W. A. (1970). Tropical development, 1880-1913: Studies in economic progress. Allen & Unwin.
Chicago-viite (17. p.)Lewis, William Arthur. Tropical Development, 1880-1913: Studies in Economic Progress. London: Allen & Unwin, 1970.
MLA-viite (9. p.)Lewis, William Arthur. Tropical Development, 1880-1913: Studies in Economic Progress. Allen & Unwin, 1970.
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