Card, D. E. (2000). Estimating the return to schooling: Progress on some persistent econometric problems. National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)Card, David E. Estimating the Return to Schooling: Progress on Some Persistent Econometric Problems. Cambridge, Mass: National Bureau of Economic Research, 2000.
MLA-Zitierstil (9. Ausg.)Card, David E. Estimating the Return to Schooling: Progress on Some Persistent Econometric Problems. National Bureau of Economic Research, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.