(2000). Political Knowledge of Students in Grades 9-12. U.S. Department of Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPolitical Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPolitical Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.
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