Cita APA (7a ed.)

Irwin, D. A. (2000). Could the U.S. iron industry have survived free trade after the civil war? National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Irwin, Douglas A. Could the U.S. Iron Industry Have Survived Free Trade After the Civil War? Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Irwin, Douglas A. Could the U.S. Iron Industry Have Survived Free Trade After the Civil War? National Bureau of Economic Research, 2000.