Não informado. (1963). Occupational safety and health abstracts. International Occupational Safety and Health Information Centre.
Chicago-referens (17:e uppl.)Não informado. Occupational Safety and Health Abstracts. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1963.
MLA-referens (8:e uppl.)Não informado. Occupational Safety and Health Abstracts. International Occupational Safety and Health Information Centre, 1963.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.