Gray, A. (1917). Principles and practice of electrical engineering (2d ed., rev. and enl.). McGraw-Hill.
Dyfyniad Arddull ChicagoGray, Alexander. Principles and Practice of Electrical Engineering. 2d ed., rev. and enl. New York: McGraw-Hill, 1917.
Dyfyniad MLAGray, Alexander. Principles and Practice of Electrical Engineering. 2d ed., rev. and enl. McGraw-Hill, 1917.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.