Alerich , W. N. . .. (1981). Electricity 3 : de motors and generators: Controls transformers (3rd ed.). Delmar.
Chicago-čujuhus (17. p.)Alerich , Walter N. Electricity 3 : De Motors and Generators: Controls Transformers. 3rd ed. Albany: Delmar, 1981.
MLA-čujuhus (9. p.)Alerich , Walter N. Electricity 3 : De Motors and Generators: Controls Transformers. 3rd ed. Delmar, 1981.
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