Cita APA (7th ed.)

Kotlikoff, L. J. (1998). The A-K model -- its past, present and future. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Kotlikoff, Laurence J. The A-K Model -- Its Past, Present and Future. Cambridge: National Bureau of Economic Research, 1998.

Cita MLA (9th ed.)

Kotlikoff, Laurence J. The A-K Model -- Its Past, Present and Future. National Bureau of Economic Research, 1998.