Não informado. (1949). Occupational Health. Royal College of Nursing Society of Occupational Health Nursing.
Citação do estilo Chicago (17ª ed.)Não informado. Occupational Health. London: Royal College of Nursing Society of Occupational Health Nursing, 1949.
Citação MLA (8ª ed.)Não informado. Occupational Health. Royal College of Nursing Society of Occupational Health Nursing, 1949.
警告：這些引文格式不一定是100％准確.