Não informado. (1940). Machine shop magazine. Engineering, Chemical & Machine Press.
Chicago-viite (17. p.)Não informado. Machine Shop Magazine. London: Engineering, Chemical & Machine Press, 1940.
MLA-viite (8. p.)Não informado. Machine Shop Magazine. Engineering, Chemical & Machine Press, 1940.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.