Não informado. (1953). Occupational health review. Department of National Health and Welfare.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Occupational Health Review. Ottawa: Department of National Health and Welfare, 1953.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Occupational Health Review. Department of National Health and Welfare, 1953.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.