Não informado. (1944). Industrial health bulletin. Department of National Health and Welfare, Industrial Health Division.
Chicago-Zitierstil (17. Ausg.)Não informado. Industrial Health Bulletin. Ottawa: Department of National Health and Welfare, Industrial Health Division, 1944.
MLA-Zitierstil (8. Ausg.)Não informado. Industrial Health Bulletin. Department of National Health and Welfare, Industrial Health Division, 1944.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.