APA
Ashenfelter O., Harmon C. & Oosterbeek H. (2000). A review of estimates of the schooling/earnings relationship with tests for publication bias. Cambridge, Mass: National Bureau of Economic Research.
Chicago
Ashenfelter Orley, Harmon Colm and Oosterbeek Hessel. 2000. A review of estimates of the schooling/earnings relationship with tests for publication bias. Cambridge, Mass: National Bureau of Economic Research.
Harvard
Ashenfelter O., Harmon C. and Oosterbeek H. (2000). A review of estimates of the schooling/earnings relationship with tests for publication bias. Cambridge, Mass: National Bureau of Economic Research.
MLA
Ashenfelter Orley, Harmon Colm and Oosterbeek Hessel. A review of estimates of the schooling/earnings relationship with tests for publication bias. Cambridge, Mass: National Bureau of Economic Research. 2000.