APA
Berkel B., Borsch Supan Axel & National Bureau Of Economic Research. (2003). Pension reform in Germany: The impact on retirement decisions. Cambridge, MA: NBER.
Chicago
Berkel Barbara, Borsch Supan Axel and National Bureau Of Economic Research. 2003. Pension reform in Germany: The impact on retirement decisions. Cambridge, MA: NBER.
Harvard
Berkel B., Borsch Supan Axel and National Bureau Of Economic Research. (2003). Pension reform in Germany: The impact on retirement decisions. Cambridge, MA: NBER.
MLA
Berkel Barbara, Borsch Supan Axel and National Bureau Of Economic Research. Pension reform in Germany: The impact on retirement decisions. Cambridge, MA: NBER. 2003.