APA (7th ed.) Citation

Feldstein, M. S., & Liebman, J. B. (2001). Social security. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Feldstein, Martin S., and Jeffrey B. Liebman. Social Security. Cambridge, MA: National Bureau of Economic Research, 2001.

MLA (9th ed.) Citation

Feldstein, Martin S., and Jeffrey B. Liebman. Social Security. National Bureau of Economic Research, 2001.

Warning: These citations may not always be 100% accurate.