Não informado. (1953). Occupational health review. Department of National Health and Welfare.
Chicago-Zitierstil (17. Ausg.)Não informado. Occupational Health Review. Ottawa: Department of National Health and Welfare, 1953.
MLA-Zitierstil (8. Ausg.)Não informado. Occupational Health Review. Department of National Health and Welfare, 1953.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.