APA
Heckman J. J., Lafontaine Paul A & National Bureau Of Economic Research. (2006). Bias corrected estimates of GED returns. Cambridge, MA: NBER.
Chicago
Heckman James J, Lafontaine Paul A and National Bureau Of Economic Research. 2006. Bias corrected estimates of GED returns. Cambridge, MA: NBER.
Harvard
Heckman J. J., Lafontaine Paul A and National Bureau Of Economic Research. (2006). Bias corrected estimates of GED returns. Cambridge, MA: NBER.
MLA
Heckman James J, Lafontaine Paul A and National Bureau Of Economic Research. Bias corrected estimates of GED returns. Cambridge, MA: NBER. 2006.
TextSeries: NBER working papersPublication details: Cambridge, MA NBER 2006Description: 28pISBN: 
Working Papers (Print)
