Não informado. (1953). Occupational health review. Department of National Health and Welfare.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Occupational Health Review. Ottawa: Department of National Health and Welfare, 1953.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Occupational Health Review. Department of National Health and Welfare, 1953.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.
