Não informado. (1929). Machine Design: As it affects engineering, production, sales. Penton Publishing.
Chicago-referens (17:e uppl.)Não informado. Machine Design: As It Affects Engineering, Production, Sales. Cleveland, Ohio: Penton Publishing, 1929.
MLA-referens (8:e uppl.)Não informado. Machine Design: As It Affects Engineering, Production, Sales. Penton Publishing, 1929.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.