Cita APA

National Board of Fire Underwriters, & National Fire Protection Association. (2010). National Electric Code 2011. Quincy, Massachusetts: National Fire Protection Association.

Citación estilo Chicago

National Board of Fire Underwriters, y National Fire Protection Association. National Electric Code 2011. Quincy, Massachusetts: National Fire Protection Association, 2010.

Cita MLA

National Board of Fire Underwriters, y National Fire Protection Association. National Electric Code 2011. Quincy, Massachusetts: National Fire Protection Association, 2010.