APA
Kotlikoff L. J., Walliser Jan, Smetters Kent A & National Bureau Of Economic Research. (1998). Social security: Privatization and progressivity. Cambridge, MA: NBER.
Chicago
Kotlikoff Laurence J, Walliser Jan, Smetters Kent A and National Bureau Of Economic Research. 1998. Social security: Privatization and progressivity. Cambridge, MA: NBER.
Harvard
Kotlikoff L. J., Walliser Jan, Smetters Kent A and National Bureau Of Economic Research. (1998). Social security: Privatization and progressivity. Cambridge, MA: NBER.
MLA
Kotlikoff Laurence J, Walliser Jan, Smetters Kent A and National Bureau Of Economic Research. Social security: Privatization and progressivity. Cambridge, MA: NBER. 1998.
