APA
Borsch-Supan A. H., National Bureau of Economic Research, Coppola M. & Reil Held A. (2012). Riester pensions in Germany. Cambridge: NBER.
Chicago
Borsch-Supan Axel H, National Bureau of Economic Research, Coppola Michela and Reil Held Anette. 2012. Riester pensions in Germany. Cambridge: NBER.
Harvard
Borsch-Supan A. H., National Bureau of Economic Research, Coppola M. and Reil Held A. (2012). Riester pensions in Germany. Cambridge: NBER.
MLA
Borsch-Supan Axel H, National Bureau of Economic Research, Coppola Michela and Reil Held Anette. Riester pensions in Germany. Cambridge: NBER. 2012.