Cita APA (7a ed.)

Feldstein, M. S., Ranguelova, E., & Samwick, A. A. (1999). The transition to investment-based social security when portfolio returns and capital profitability are uncertain. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Feldstein, Martin S., Elena Ranguelova, y Andrew A. Samwick. The Transition to Investment-based Social Security When Portfolio Returns and Capital Profitability Are Uncertain. Cambridge, MA: National Bureau of Economic Research, 1999.

Cita MLA (9a ed.)

Feldstein, Martin S., et al. The Transition to Investment-based Social Security When Portfolio Returns and Capital Profitability Are Uncertain. National Bureau of Economic Research, 1999.