Earl, J. T. (1986). Electrical wiring, design and applications. Prentice-Hall.
Cita Chicago (17th ed.)Earl, John T. Electrical Wiring, Design and Applications. Englewood Cliffs, N.J: Prentice-Hall, 1986.
Cita MLA (9th ed.)Earl, John T. Electrical Wiring, Design and Applications. Prentice-Hall, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.