APA (7th ed.) Citation

Williams, E. (1961). Thermionic valve circuits (4. ed.). Pitman.

Chicago Style (17th ed.) Citation

Williams, Emrys. Thermionic Valve Circuits. 4. ed. London: Pitman, 1961.

MLA (9th ed.) Citation

Williams, Emrys. Thermionic Valve Circuits. 4. ed. Pitman, 1961.

Warning: These citations may not always be 100% accurate.