Cita APA (7a ed.)

Lichtenberg, F. R. (2002). Sources of U.S. longevity increase, 1960-1997. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Lichtenberg, Frank R. Sources of U.S. Longevity Increase, 1960-1997. Cambridge, MA: National Bureau of Economic Research, 2002.

Cita MLA (9a ed.)

Lichtenberg, Frank R. Sources of U.S. Longevity Increase, 1960-1997. National Bureau of Economic Research, 2002.