Cumper,George E. (1991). The evaluation of national systems. Oxford University Press.
Čikaški stil citiranja (17. izdanje)Cumper,George E. The Evaluation of National Systems. New york: Oxford University Press, 1991.
MLA način citiranja (8. izdanje)Cumper,George E. The Evaluation of National Systems. Oxford University Press, 1991.
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