Não informado. (1953). Occupational health review. Department of National Health and Welfare.
Chicago Style (17. basım) AtıfNão informado. Occupational Health Review. Ottawa: Department of National Health and Welfare, 1953.
MLA (8th ed.) AtıfNão informado. Occupational Health Review. Department of National Health and Welfare, 1953.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..