Não informado. (1940). Machine shop magazine. Engineering, Chemical & Machine Press.
Chicago-referens (17:e uppl.)Não informado. Machine Shop Magazine. London: Engineering, Chemical & Machine Press, 1940.
MLA-referens (8:e uppl.)Não informado. Machine Shop Magazine. Engineering, Chemical & Machine Press, 1940.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.