Herman, S. L. (2010). Electrical studies for trades (4th ed.). Delmar Cengage Learning.
Cita Chicago (17th ed.)Herman, Stephen L. Electrical Studies for Trades. 4th ed. Clifton Park, N.Y: Delmar Cengage Learning, 2010.
Cita MLA (9th ed.)Herman, Stephen L. Electrical Studies for Trades. 4th ed. Delmar Cengage Learning, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.