Illinois Society for the Prevention of Blindness. Publications. Illinois Society for the Prevention of Blindess.
Chicago-referens (17:e uppl.)Illinois Society for the Prevention of Blindness. Publications. Chicago: Illinois Society for the Prevention of Blindess.
MLA-referens (8:e uppl.)Illinois Society for the Prevention of Blindness. Publications. Illinois Society for the Prevention of Blindess.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.