Hughes, E. (1967). Electrical technology (3rd ed.). Longmans.
Cita Chicago (17th ed.)Hughes, Edward. Electrical Technology. 3rd ed. London: Longmans, 1967.
Cita MLA (8th ed.)Hughes, Edward. Electrical Technology. 3rd ed. Longmans, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.