1. Blustein, P. (1987). Protectionist views win respect, friends for John Culbertson. The Wall Street Journal, 2 April: A1.
2. Boudreaux, D. (2004). Does increased international mobility of factors of production weaken the case for Free Trade? Cato Journal, 23(3), 373–379.
3. Cipolla, C. (1976). Before the industrial revolution: European society and economy, 1000–1700. New York: Norton.
4. Culbertson, J. M. (1984). International trade and the future of the West. Madison, WI: 21st Century.
5. Culbertson, J. M. (1985). The dangers of “Free Trade”. Madison, WI: 21st Century.