APA-referens (7:e uppl.)

(2000). Political Knowledge of Students in Grades 9-12. U.S. Department of Education.

Chicago-referens (17:e uppl.)

Political Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.

MLA-referens (9:e uppl.)

Political Knowledge of Students in Grades 9-12. U.S. Department of Education, 2000.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.