Cumper,George E. (1991). The evaluation of national systems. Oxford University Press.
芝加哥风格引文Cumper,George E. The Evaluation of National Systems. New york: Oxford University Press, 1991.
MLA引文Cumper,George E. The Evaluation of National Systems. Oxford University Press, 1991.
警告：这些引文格式不一定是100％准确.