(2000). Political Knowledge of Students in Grades 9-12. U.S. Department of Education.
Chicago Style (17. basım) AtıfPolitical Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.
MLA (9th ed.) AtıfPolitical Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.
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