Herman, S. L. (2012). Practical problems in mathematics for electricians (8th ed.). Delmar Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Herman, Stephen L. Practical Problems in Mathematics for Electricians. 8th ed. Clifton Park, N.Y: Delmar Cengage Learning, 2012.
Lua MLA (9ú heag.)Herman, Stephen L. Practical Problems in Mathematics for Electricians. 8th ed. Delmar Cengage Learning, 2012.
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