APA-referens (7:e uppl.)

(2000). Average Math & Science Performance Scores of 4th- Grade Students. U.S. Department of Education.

Chicago-referens (17:e uppl.)

Average Math & Science Performance Scores of 4th- Grade Students. U.S. Department of Education, 2000.

MLA-referens (9:e uppl.)

Average Math & Science Performance Scores of 4th- Grade Students. U.S. Department of Education, 2000.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.