Lua APA (7ú heag.)

(1995). National electrical code handbook, 1996. National Fire Protection Association.

Lua i Stíl Chicago (17ú heag.)

National Electrical Code Handbook, 1996. Battery March Park, Quincy, MA: National Fire Protection Association, 1995.

Lua MLA (9ú heag.)

National Electrical Code Handbook, 1996. National Fire Protection Association, 1995.

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