Cumper,George E. (1991). The evaluation of national systems. Oxford University Press.
Chicagoスタイル(17版)引用形式Cumper,George E. The Evaluation of National Systems. New york: Oxford University Press, 1991.
MLA(8版)引用形式Cumper,George E. The Evaluation of National Systems. Oxford University Press, 1991.
警告: この引用は必ずしも正確ではありません.