Vousden, N. (1990). The economics of trade protection. Cambridge University Press.
芝加哥风格引文Vousden, Neil. The Economics of Trade Protection. Cambridge ; New York: Cambridge University Press, 1990.
MLA引文Vousden, Neil. The Economics of Trade Protection. Cambridge University Press, 1990.
警告：这些引文格式不一定是100％准确.