International Labor Office. (1958). International standard classification of occupations. [s.n.].
Chicago Style (17th ed.) CitationInternational Labor Office. International Standard Classification of Occupations. Geneva: [s.n.], 1958.
MLA (9th ed.) CitationInternational Labor Office. International Standard Classification of Occupations. [s.n.], 1958.
Warning: These citations may not always be 100% accurate.