Skvarenina, T. L., & DeWitt, W. E. (2004). Electrical power and controls (Second edition.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Skvarenina, Timothy L., agus William E. DeWitt. Electrical Power and Controls. Second edition. Upper Saddle River, NJ: Pearson/Prentice Hall, 2004.
Lua MLA (8ú heag.)Skvarenina, Timothy L., agus William E. DeWitt. Electrical Power and Controls. Second edition. Pearson/Prentice Hall, 2004.
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