Cita APA (7a ed.)

Helliwell, J. F., & Putnam, R. D. (1999). Education and social capital. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Helliwell, John F., y Robert D. Putnam. Education and Social Capital. Cambridge, MA: National Bureau of Economic Research, 1999.

Cita MLA (9a ed.)

Helliwell, John F., y Robert D. Putnam. Education and Social Capital. National Bureau of Economic Research, 1999.