APA (7th ed.) Citation

Sparkes, J. J., Zorkoczy, P., & Attenborough, K. (1972). The heart of computers. Open U.P..

Chicago Style (17th ed.) Citation

Sparkes, John J., Peter Zorkoczy, and Keith Attenborough. The Heart of Computers. Bletchley, Bucks.: Open U.P., 1972.

MLA (8th ed.) Citation

Sparkes, John J., et al. The Heart of Computers. Open U.P., 1972.