Mulligan, C. B., & Sala-i-Martin, X. (1999). Social security in theory and practice (II): Facts and political theories. National Bureau of Economic Research.
Style de citation Chicago (17e éd.)Mulligan, Casey B., et Xavier Sala-i-Martin. Social Security in Theory and Practice (II): Facts and Political Theories. Cambridge: National Bureau of Economic Research, 1999.
Style de citation MLA (9e éd.)Mulligan, Casey B., et Xavier Sala-i-Martin. Social Security in Theory and Practice (II): Facts and Political Theories. National Bureau of Economic Research, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.