National Fire Protection Association & American National Standards Institute. (2007). National electrical code: 2008 (2008 ed.). National Fire Protection Association.
Cita Chicago Style (17a ed.)National Fire Protection Association y American National Standards Institute. National Electrical Code: 2008. 2008 ed. Quincy, Mass: National Fire Protection Association, 2007.
Cita MLA (9a ed.)National Fire Protection Association y American National Standards Institute. National Electrical Code: 2008. 2008 ed. National Fire Protection Association, 2007.
Precaución: Estas citas no son 100% exactas.