APA aipamena

International Labour Office. (1949). International Standard Classification of Occupations (1949.). International Labour Office.

Chicago Style aipamena

International Labour Office. International Standard Classification of Occupations. 1949. [s.l: International Labour Office, 1949.

MLA aipamena

International Labour Office. International Standard Classification of Occupations. 1949. International Labour Office, 1949.