Gray, A. (1914). Principles and practice of electrical engineering. McGraw-Hill Book Company, inc..
Chicago-referens (17:e uppl.)Gray, Alexander. Principles and Practice of Electrical Engineering. New York [etc.]: McGraw-Hill Book Company, inc., 1914.
MLA-referens (8:e uppl.)Gray, Alexander. Principles and Practice of Electrical Engineering. McGraw-Hill Book Company, inc., 1914.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.