APA-referens (7:e uppl.)

Kotlikoff, L. J., Smetters, K. A., & Walliser, J. (1998). Social security: Privatization and progressivity. National Bureau of Economic Research.

Chicago-referens (17:e uppl.)

Kotlikoff, Laurence J., Kent A. Smetters, och Jan Walliser. Social Security: Privatization and Progressivity. Cambride: National Bureau of Economic Research, 1998.

MLA-referens (9:e uppl.)

Kotlikoff, Laurence J., et al. Social Security: Privatization and Progressivity. National Bureau of Economic Research, 1998.