Não informado. (1987). Power Engineering Journal. Institution of Electrical Engineers.
Chicago-referens (17:e uppl.)Não informado. Power Engineering Journal. Herts, Inglaterra: Institution of Electrical Engineers, 1987.
MLA-referens (8:e uppl.)Não informado. Power Engineering Journal. Institution of Electrical Engineers, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.