Não informado. (1953). Occupational health review. Department of National Health and Welfare.
Chicago (17e ed.) BronvermeldingNão informado. Occupational Health Review. Ottawa: Department of National Health and Welfare, 1953.
MLA (8e ed.) BronvermeldingNão informado. Occupational Health Review. Department of National Health and Welfare, 1953.
Let op: Deze citaties zijn niet altijd 100% accuraat.