Orna, E. (1978). Thesaurus: Engineering Industry Training Board, Library and Information Services. Engineering Industry Training Board.
Chicago-referens (17:e uppl.)Orna, Elizabeth. Thesaurus: Engineering Industry Training Board, Library and Information Services. Watford [Hertfordshire]: Engineering Industry Training Board, 1978.
MLA-referens (8:e uppl.)Orna, Elizabeth. Thesaurus: Engineering Industry Training Board, Library and Information Services. Engineering Industry Training Board, 1978.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.