Não informado. (1949). Occupational Health. Royal College of Nursing Society of Occupational Health Nursing.
Chicago-Zitierstil (17. Ausg.)Não informado. Occupational Health. London: Royal College of Nursing Society of Occupational Health Nursing, 1949.
MLA-Zitierstil (8. Ausg.)Não informado. Occupational Health. Royal College of Nursing Society of Occupational Health Nursing, 1949.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.