Cita APA (7a ed.)

Engelhardt, G. V., Gruber, J., & Perry, C. D. (2002). Social security and elderly living arrangements. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Engelhardt, Gary V., Jonathan Gruber, y Cynthia D. Perry. Social Security and Elderly Living Arrangements. Cambridge, MA: National Bureau of Economic Research, 2002.

Cita MLA (9a ed.)

Engelhardt, Gary V., et al. Social Security and Elderly Living Arrangements. National Bureau of Economic Research, 2002.