Friedberg, L. (1998). The effect of old age assistance on retirement. National Bureau of Economic Research.
Citazione stile Chigago Style (17a edizione)Friedberg, Leora. The Effect of Old Age Assistance on Retirement. Cambridge: National Bureau of Economic Research, 1998.
Citatione MLA (9a ed.)Friedberg, Leora. The Effect of Old Age Assistance on Retirement. National Bureau of Economic Research, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.