APA

Radio instruments and measurements : circular no. 74 of the bureau of standards Department of Commerce Washington, D. C. New York : Wireless Press Inc., 1920: .

Chicago

Radio instruments and measurements : circular no. 74 of the bureau of standards Department of Commerce Washington, D. C. New York : Wireless Press Inc., 1920: .

Harvard

Radio instruments and measurements : circular no. 74 of the bureau of standards Department of Commerce Washington, D. C. New York : Wireless Press Inc., 1920: .

MLA

New York : Wireless Press Inc., 1920: . .