APA (7th ed.) Citation

Say, M. G., & Laughton, M. A. (1985). Electrical engineer's reference book (14th ed.). Butterworths.

Chicago Style (17th ed.) Citation

Say, M. G., and Michael A. Laughton. Electrical Engineer's Reference Book. 14th ed. London ; Wellington: Butterworths, 1985.

MLA (8th ed.) Citation

Say, M. G., and Michael A. Laughton. Electrical Engineer's Reference Book. 14th ed. Butterworths, 1985.