Gustman, A. L., & Steinmeier, T. L. (1998). Changing pensions in cross-section and panel data: Analysis with employer provided plan descriptions. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Gustman, Alan L., agus Thomas L. Steinmeier. Changing Pensions in Cross-section and Panel Data: Analysis with Employer Provided Plan Descriptions. Cambridge: National Bureau of Economic Research, 1998.
Lua MLA (9ú heag.)Gustman, Alan L., agus Thomas L. Steinmeier. Changing Pensions in Cross-section and Panel Data: Analysis with Employer Provided Plan Descriptions. National Bureau of Economic Research, 1998.
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