APA (7th ed.) Citation

Gayford, M. L. (1969). Modern relay techniques. Butterworths.

Chicago Style (17th ed.) Citation

Gayford, M. L. Modern Relay Techniques. London: Butterworths, 1969.

MLA (8th ed.) Citation

Gayford, M. L. Modern Relay Techniques. Butterworths, 1969.

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