Não informado. (1960). Production Engineers. Institution of Production Engineers.
Chicago-referens (17:e uppl.)Não informado. Production Engineers. London: Institution of Production Engineers, 1960.
MLA-referens (8:e uppl.)Não informado. Production Engineers. Institution of Production Engineers, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.