APA aipamena

Gruber, J., & Wise, D. (1997). Social security programs and retirement around the world. National Bureau of Economic Research.

Chicago Style aipamena

Gruber, Jonathan, and David Wise. Social Security Programs and Retirement Around the World. Cambridge: National Bureau of Economic Research, 1997.

MLA aipamena

Gruber, Jonathan, and David Wise. Social Security Programs and Retirement Around the World. National Bureau of Economic Research, 1997.