Mullin, R. C. (1996). Electrical wiring: Residential (12th ed.). Delmar.
Lua i Stíl Chicago (17ú heag.)Mullin, Ray C. Electrical Wiring: Residential. 12th ed. Albany: Delmar, 1996.
Lua MLA (9ú heag.)Mullin, Ray C. Electrical Wiring: Residential. 12th ed. Delmar, 1996.
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