APA-referens (7:e uppl.)

Physical Disabilities: Education & Related Services. Division for Physical, Health & Multiple Disabilities.

Chicago-referens (17:e uppl.)

Physical Disabilities: Education & Related Services. Division for Physical, Health & Multiple Disabilities.

MLA-referens (9:e uppl.)

Physical Disabilities: Education & Related Services. Division for Physical, Health & Multiple Disabilities.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.