Cita APA (7a ed.)

Boldrin, M., Peracchi, F., & Jiménez-Martín, S. (1997). Social security and retirement in Spain. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Boldrin, Michele, Franco Peracchi, y Sergi Jiménez-Martín. Social Security and Retirement in Spain. Cambridge, MA: National Bureau of Economic Research, 1997.

Cita MLA (9a ed.)

Boldrin, Michele, et al. Social Security and Retirement in Spain. National Bureau of Economic Research, 1997.