Friedberg, L. (1998). The effect of old age assistance on retirement. National Bureau of Economic Research.
芝加哥风格引文Friedberg, Leora. The Effect of Old Age Assistance on Retirement. Cambridge: National Bureau of Economic Research, 1998.
MLA引文Friedberg, Leora. The Effect of Old Age Assistance on Retirement. National Bureau of Economic Research, 1998.
警告：这些引文格式不一定是100％准确.