Gale Research Inc & Gale Group. (2007). Super LCCS : Gale's Library of Congress classification schedules: Combined with additions and changes through 2006. Thomson Gale.
Chicago-referens (17:e uppl.)Gale Research Inc och Gale Group. Super LCCS : Gale's Library of Congress Classification Schedules: Combined with Additions and Changes Through 2006. Detroit: Thomson Gale, 2007.
MLA-referens (9:e uppl.)Gale Research Inc och Gale Group. Super LCCS : Gale's Library of Congress Classification Schedules: Combined with Additions and Changes Through 2006. Thomson Gale, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.