Lewis, W. W. (2004). The power of productivity: Wealth, poverty, and the threat to global stability. University of Chicago Press.
Citace podle Chicago (17th ed.)Lewis, William W. The Power of Productivity: Wealth, Poverty, and the Threat to Global Stability. Chicago: University of Chicago Press, 2004.
Citace podle MLA (9th ed.)Lewis, William W. The Power of Productivity: Wealth, Poverty, and the Threat to Global Stability. University of Chicago Press, 2004.
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