Borsch-Supan, A., & Schnabel, R. (1997). Social security and retirement in Germany. National Bureau of Economic Research.
Čikaški stil citiranja (17. izdanje)Borsch-Supan, Axel, i Reinhold Schnabel. Social Security and Retirement in Germany. Cambridge: National Bureau of Economic Research, 1997.
MLA način citiranja (9. izdanje)Borsch-Supan, Axel, i Reinhold Schnabel. Social Security and Retirement in Germany. National Bureau of Economic Research, 1997.
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