International Labour Office, Geneva. (1990). International Standard Classification of Occupations. UN.
Chicago Style (17th ed.) CitationInternational Labour Office, Geneva. International Standard Classification of Occupations. Geneva: UN, 1990.
MLA (8th ed.) CitationInternational Labour Office, Geneva. International Standard Classification of Occupations. UN, 1990.
Warning: These citations may not always be 100% accurate.