Não informado. (2007). Engineering & Technology. Institution of Engineering and Technology.
Chicago-referens (17:e uppl.)Não informado. Engineering & Technology. Stevenage, Inglaterra: Institution of Engineering and Technology, 2007.
MLA-referens (8:e uppl.)Não informado. Engineering & Technology. Institution of Engineering and Technology, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.