Ashenfelter, O., Harmon, C., & Oosterbeek, H. (1999). A review of estimates of the schooling/earnings relationship, with tests for publication bias. National Bureau of Economic Research.
Chicago-referens (17:e uppl.)Ashenfelter, Orley, Colm Harmon, och Hessel Oosterbeek. A Review of Estimates of the Schooling/earnings Relationship, with Tests for Publication Bias. Cambridge: National Bureau of Economic Research, 1999.
MLA-referens (9:e uppl.)Ashenfelter, Orley, et al. A Review of Estimates of the Schooling/earnings Relationship, with Tests for Publication Bias. National Bureau of Economic Research, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.