^GDP (official exchange rate), The World Factbook, Central Intelligence Agency. Population data obtained from Total Midyear Population Archived 2013-10-12 at the Wayback Machine, U.S. Census Bureau, International Data Base. Note: Per capita values were obtained by dividing the GDP (official exchange rate) data by the Population data.
^Bruns, Barbara; Luque, Javier (2014). "Great Teachers: How to Raise Student Learning In Latin American and the Caribbean" (PDF). World Bank. Retrieved March 24, 2019.
^"2016 Environmental Performance Index" (PDF). Archived from the original (PDF) on 2017-10-04. Retrieved 2017-04-25.