Smith, R. L., & Herman, S. L. (2008). Electrical wiring industrial (13th ed.). Delmar Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Smith, Robert L., agus Stephen L. Herman. Electrical Wiring Industrial. 13th ed. Clifton Park, N.Y: Delmar Cengage Learning, 2008.
Lua MLA (9ú heag.)Smith, Robert L., agus Stephen L. Herman. Electrical Wiring Industrial. 13th ed. Delmar Cengage Learning, 2008.
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