APA (7th ed.) Citation

Gayford, M. L. (1969). Modern relay techniques ([1st ed.].). Newnes-Butterworths.

Chicago Style (17th ed.) Citation

Gayford, M. L. Modern Relay Techniques. [1st ed.]. London: Newnes-Butterworths, 1969.

MLA (9th ed.) Citation

Gayford, M. L. Modern Relay Techniques. [1st ed.]. Newnes-Butterworths, 1969.