Cita APA (7a ed.)

Keller, W., & Shiue, C. H. (2008). Tariffs, trains, and trade: The role of institutions versus technology in the expansion of markets. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Keller, Wolfgang, y Carol H. Shiue. Tariffs, Trains, and Trade: The Role of Institutions Versus Technology in the Expansion of Markets. Cambridge, MA: National Bureau of Economic Research, 2008.

Cita MLA (9a ed.)

Keller, Wolfgang, y Carol H. Shiue. Tariffs, Trains, and Trade: The Role of Institutions Versus Technology in the Expansion of Markets. National Bureau of Economic Research, 2008.