National Fire Protection Association & American National Standards Institute. (2007). National electrical code: 2008 (2008 ed.). National Fire Protection Association.
Chicago (17e ed.) BronvermeldingNational Fire Protection Association en American National Standards Institute. National Electrical Code: 2008. 2008 ed. Quincy, Mass: National Fire Protection Association, 2007.
MLA (9e ed.) BronvermeldingNational Fire Protection Association en American National Standards Institute. National Electrical Code: 2008. 2008 ed. National Fire Protection Association, 2007.
Let op: Deze citaties zijn niet altijd 100% accuraat.