Gruber, J., & Wise, D. A. (2005). Social security programs and retirement around the world: Fiscal implications, introduction and summary. National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)Gruber, Jonathan, und David A. Wise. Social Security Programs and Retirement Around the World: Fiscal Implications, Introduction and Summary. Cambridge, Mass: National Bureau of Economic Research, 2005.
MLA-Zitierstil (9. Ausg.)Gruber, Jonathan, und David A. Wise. Social Security Programs and Retirement Around the World: Fiscal Implications, Introduction and Summary. National Bureau of Economic Research, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.