Hoffmann, E. (2001). Coding occupation and industry in a population census. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Hoffmann, Eivind. Coding Occupation and Industry in a Population Census. International Labour Organization, 2001.
Citatione MLA (9a ed.)Hoffmann, Eivind. Coding Occupation and Industry in a Population Census. International Labour Organization, 2001.
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