Costa, D. L. (1998). The evolution of retirement: An American economic history, 1880-1990. University of Chicago Press.
Chicago-čujuhus (17. p.)Costa, Dora L. The Evolution of Retirement: An American Economic History, 1880-1990. Chicago: University of Chicago Press, 1998.
MLA-čujuhus (9. p.)Costa, Dora L. The Evolution of Retirement: An American Economic History, 1880-1990. University of Chicago Press, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.