Cita APA (7th ed.)

Friedberg, L. (1998). The effect of old age assistance on retirement. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Friedberg, Leora. The Effect of Old Age Assistance on Retirement. Cambridge: National Bureau of Economic Research, 1998.

Cita MLA (9th ed.)

Friedberg, Leora. The Effect of Old Age Assistance on Retirement. National Bureau of Economic Research, 1998.