Munnell, A. H., & Sass, S. A. (2008). Working longer: The solution to the retirement income challenge. Brookings Institution Press.
Chicago-čujuhus (17. p.)Munnell, Alicia Haydock, juo Steven A. Sass. Working Longer: The Solution to the Retirement Income Challenge. Washington, D.C.: Brookings Institution Press, 2008.
MLA-čujuhus (9. p.)Munnell, Alicia Haydock, juo Steven A. Sass. Working Longer: The Solution to the Retirement Income Challenge. Brookings Institution Press, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.