Cita APA

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

Citación estilo Chicago

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

Cita MLA

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