APA
Sinn H., National Bureau Of Economic Research, . (1998). The pay-as-you-go pension system as a fertility insurance and enforcement device. Cambridge, MA: NBER.
Chicago
Sinn Hans-Werner, National Bureau Of Economic Research, . 1998. The pay-as-you-go pension system as a fertility insurance and enforcement device. Cambridge, MA: NBER.
Harvard
Sinn H., National Bureau Of Economic Research, . (1998). The pay-as-you-go pension system as a fertility insurance and enforcement device. Cambridge, MA: NBER.
MLA
Sinn Hans-Werner, National Bureau Of Economic Research, . The pay-as-you-go pension system as a fertility insurance and enforcement device. Cambridge, MA: NBER. 1998.