Von Richthofen, W. (2002). Labour inspection: A guide to the profession. International Labour Office.
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Chicago-čujuhus (17. p.)
Von Richthofen, W. Labour Inspection: A Guide to the Profession. Geneva: International Labour Office, 2002.
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MLA-čujuhus (9. p.)
Von Richthofen, W. Labour Inspection: A Guide to the Profession. International Labour Office, 2002.
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