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Lua i Stíl Chicago (17ú heag.)Feinstein, Jonathan S., agus Chin-Chin Ho. Elderly Asset Management and Health: An Empirical Analysis. Cambridge: National Bureau of Economic Research, 2000.
Lua MLA (9ú heag.)Feinstein, Jonathan S., agus Chin-Chin Ho. Elderly Asset Management and Health: An Empirical Analysis. National Bureau of Economic Research, 2000.
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