Cita APA (7a ed.)

Card, D. E. (2000). Estimating the return to schooling: Progress on some persistent econometric problems. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Card, David E. Estimating the Return to Schooling: Progress on Some Persistent Econometric Problems. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Card, David E. Estimating the Return to Schooling: Progress on Some Persistent Econometric Problems. National Bureau of Economic Research, 2000.