APA
O' Rourke K. H., Williamson J. G., . (1999). The Heckscher-Ohlin model between 1400 and 2000 : when it explained factor price convergence, when it did not, and why. Cambridge, Mass: National Bureau of Economic Research.
Chicago
O' Rourke Kevin H, Williamson Jeffrey G, . 1999. The Heckscher-Ohlin model between 1400 and 2000 : when it explained factor price convergence, when it did not, and why. Cambridge, Mass: National Bureau of Economic Research.
Harvard
O' Rourke K. H., Williamson J. G., . (1999). The Heckscher-Ohlin model between 1400 and 2000 : when it explained factor price convergence, when it did not, and why. Cambridge, Mass: National Bureau of Economic Research.
MLA
O' Rourke Kevin H, Williamson Jeffrey G, . The Heckscher-Ohlin model between 1400 and 2000 : when it explained factor price convergence, when it did not, and why. Cambridge, Mass: National Bureau of Economic Research. 1999.