Não informado. (1963). Occupational safety and health abstracts. International Occupational Safety and Health Information Centre.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Occupational Safety and Health Abstracts. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1963.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Occupational Safety and Health Abstracts. International Occupational Safety and Health Information Centre, 1963.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.