APA (7th ed.) Citation

Valley, G. E., & Wallman, H. (1948). Vacuum tube amplifiers. McGraw-Hill Book Co..

Chicago Style (17th ed.) Citation

Valley, George Edward, and Henry Wallman. Vacuum Tube Amplifiers. New York: McGraw-Hill Book Co., 1948.

MLA (9th ed.) Citation

Valley, George Edward, and Henry Wallman. Vacuum Tube Amplifiers. McGraw-Hill Book Co., 1948.