Não informado. (1953). Occupational health bulletin. Department of National Health and Welfare, Industrial Health Division.
Cita Chicago Style (17a ed.)Não informado. Occupational Health Bulletin. Ottawa: Department of National Health and Welfare, Industrial Health Division, 1953.
Cita MLA (8a ed.)Não informado. Occupational Health Bulletin. Department of National Health and Welfare, Industrial Health Division, 1953.
Precaución: Estas citas no son 100% exactas.