APA (7th ed.) Citation

Say, M. G., Jones, G. R., & Laughton, M. A. (1993). Electrical engineer's reference book (15th ed.). Butterworth-Heinemann.

Chicago Style (17th ed.) Citation

Say, M. G., G. R. Jones, and Michael A. Laughton. Electrical Engineer's Reference Book. 15th ed. Oxford ; Boston: Butterworth-Heinemann, 1993.

MLA (8th ed.) Citation

Say, M. G., et al. Electrical Engineer's Reference Book. 15th ed. Butterworth-Heinemann, 1993.