APA (7th ed.) Citation

Sala i Martín, X. (2002). The world distribution of income: (estimated from individual country distributions). National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Sala i Martín, Xavier. The World Distribution of Income: (estimated from Individual Country Distributions). Cambridge, MA: National Bureau of Economic Research, 2002.

MLA (9th ed.) Citation

Sala i Martín, Xavier. The World Distribution of Income: (estimated from Individual Country Distributions). National Bureau of Economic Research, 2002.