Wikimedia
Wikipedia: List of Countries by Gdp (Ppp) Per Capita
A ranking of the world's countries by per capita GDP (Gross Domestic Product).
PBS
Pbs: Total Gdp vs. Per Capital Gdp
Using a chart for seven different nations for the year 1999, rankings are used to illustrate the differences between total GDP and per capita GDP.
US Department of Commerce
Bureau of Economic Analysis: Gross Domestic Product
This site contains links to gross domestic product data prepared by the Bureau of Economic Analysis.