Orna, E. (1978). Thesaurus: Engineering Industry Training Board, Library and Information Services. Engineering Industry Training Board.
Citazione stile Chigago Style (17a edizione)Orna, Elizabeth. Thesaurus: Engineering Industry Training Board, Library and Information Services. Watford [Hertfordshire]: Engineering Industry Training Board, 1978.
Citatione MLA (8a ed.)Orna, Elizabeth. Thesaurus: Engineering Industry Training Board, Library and Information Services. Engineering Industry Training Board, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.