(2000). International Comparisons of Educational Attainment, by Age. U.S. Department of Education.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)International Comparisons of Educational Attainment, by Age. U.S. Department of Education, 2000.
MLA -ийн эшлэл (9 дэх хэвлэлт)International Comparisons of Educational Attainment, by Age. U.S. Department of Education, 2000.
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