(2000). Trends in the Writing Performance of 4th-, 8th-, & 11th- Grade Students. U.S. Department of Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Trends in the Writing Performance of 4th-, 8th-, & 11th- Grade Students. U.S. Department of Education, 2000.
Παραπομπή σε μορφή MLA (9th εκδ.)Trends in the Writing Performance of 4th-, 8th-, & 11th- Grade Students. U.S. Department of Education, 2000.
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