National Electrical Manufactures Association. (1997). Training manual on fire alarm systems.
Chicago-referens (17:e uppl.)National Electrical Manufactures Association. Training Manual on Fire Alarm Systems. New York, N.Y., National lectrical manufactures association, 1997.
MLA-referens (9:e uppl.)National Electrical Manufactures Association. Training Manual on Fire Alarm Systems. 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.