Cumper,George E. (1991). The evaluation of national systems. Oxford University Press.
Chicago Style (17th ed.) CitationCumper,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:這些引文格式不一定是100%准確.