ELECTRICAL POWER & DUGAN, R. C. [. (2003). Electrical power systems quality.-- ed.2. McGraw-Hill.

ELECTRICAL POWER and Roger C. [et.al] DUGAN. Electrical Power Systems Quality.-- Ed.2. New York: McGraw-Hill, 2003.

ELECTRICAL POWER and Roger C. [et.al] DUGAN. Electrical Power Systems Quality.-- Ed.2. McGraw-Hill, 2003.