World Bank & World Bank. (2006). Where is the wealth of nations: Measuring capital for the 21st century. The World Bank.
Lua i Stíl Chicago (17ú heag.)World Bank agus World Bank. Where Is the Wealth of Nations: Measuring Capital for the 21st Century. Washington, D.C.: The World Bank, 2006.
Lua MLA (9ú heag.)World Bank agus World Bank. Where Is the Wealth of Nations: Measuring Capital for the 21st Century. The World Bank, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.