Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
Chicago-referens (17:e uppl.)Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
MLA-referens (9:e uppl.)Percentage of Students With Disabilities Ages 6-21: 1986-96. US Department of Education.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.