Hammer, J. S. (1985). Population growth and savings in developing countries: A survey. World Bank.
Lua i Stíl Chicago (17ú heag.)Hammer, Jeffrey S. Population Growth and Savings in Developing Countries: A Survey. Washington, D.C: World Bank, 1985.
Lua MLA (9ú heag.)Hammer, Jeffrey S. Population Growth and Savings in Developing Countries: A Survey. World Bank, 1985.
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