Jenks, W. Encyclopaedia of occupational health and safety. International Labour Office.
Tohutoru Kātū Chicago (17th ed.)Jenks, Wilfred. Encyclopaedia of Occupational Health and Safety. Geneva: International Labour Office.
Tohutoro MLA (9th ed.)Jenks, Wilfred. Encyclopaedia of Occupational Health and Safety. International Labour Office.
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