Não informado. (1957). Electrical equipment news. Southam Business Publications.
Chicago-Zitierstil (17. Ausg.)Não informado. Electrical Equipment News. Toronto, Canada: Southam Business Publications, 1957.
MLA-Zitierstil (8. Ausg.)Não informado. Electrical Equipment News. Southam Business Publications, 1957.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.