APA (7th ed.) Citation

Mulligan, C. B., Gil, R., & Sala i Martín, X. (2002). Social security and democracy. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Mulligan, Casey B., Ricard Gil, and Xavier Sala i Martín. Social Security and Democracy. Cambridge, MA: National Bureau of Economic Research, 2002.

MLA (9th ed.) Citation

Mulligan, Casey B., et al. Social Security and Democracy. National Bureau of Economic Research, 2002.