Não informado. (1891). Electrical news and engineering. Southam Business Publications.
Chicago-referens (17:e uppl.)Não informado. Electrical News and Engineering. Toronto, Canada: Southam Business Publications, 1891.
MLA-referens (8:e uppl.)Não informado. Electrical News and Engineering. Southam Business Publications, 1891.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.