APA-Zitierstil (7. Ausg.)

Collins, W. J., O'Rourke, K. H., & Williamson, J. G. (1997). Were trade and factor mobility substitutes in history?

Chicago-Zitierstil (17. Ausg.)

Collins, William J., Kevin Hjortshøj O'Rourke, und Jeffrey G. Williamson. Were Trade and Factor Mobility Substitutes in History? Cambridge, Mass, 1997.

MLA-Zitierstil (9. Ausg.)

Collins, William J., et al. Were Trade and Factor Mobility Substitutes in History? 1997.