Não informado. (1918). Monthly Labor Review. Department of Labour, Bureau of Labor Statistics.
Chicago-referens (17:e uppl.)Não informado. Monthly Labor Review. Washington: Department of Labour, Bureau of Labor Statistics, 1918.
MLA-referens (8:e uppl.)Não informado. Monthly Labor Review. Department of Labour, Bureau of Labor Statistics, 1918.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.