Não informado. (1949). Occupational Health. Royal College of Nursing Society of Occupational Health Nursing.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Occupational Health. London: Royal College of Nursing Society of Occupational Health Nursing, 1949.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Occupational Health. Royal College of Nursing Society of Occupational Health Nursing, 1949.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.