Não informado. (1962). Work-Environment-Health. Institute of Occupational Health.
Chicago-referens (17:e uppl.)Não informado. Work-Environment-Health. Helsinki: Institute of Occupational Health, 1962.
MLA-referens (8:e uppl.)Não informado. Work-Environment-Health. Institute of Occupational Health, 1962.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.