Cita APA (7th ed.)

International Labor Office & International Conference of Labor Statisticians. (1957). International standard classification of occupations: Major minor and unit groups ; final draft. [s.n.].

Cita Chicago (17th ed.)

International Labor Office i International Conference of Labor Statisticians. International Standard Classification of Occupations: Major Minor and Unit Groups ; Final Draft. Geneva: [s.n.], 1957.

Cita MLA (9th ed.)

International Labor Office i International Conference of Labor Statisticians. International Standard Classification of Occupations: Major Minor and Unit Groups ; Final Draft. [s.n.], 1957.