Cita APA (7a ed.)

Börsch-Supan, A., & Schnabel, R. (1997). Social security and retirement in Germany. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Börsch-Supan, Axel, y Reinhold Schnabel. Social Security and Retirement in Germany. Cambridge, MA: National Bureau of Economic Research, 1997.

Cita MLA (9a ed.)

Börsch-Supan, Axel, y Reinhold Schnabel. Social Security and Retirement in Germany. National Bureau of Economic Research, 1997.