APA (7th ed.) Citation

Davies, I. K., & Hartley, J. (1972). Contributions to an educational technology. Butterworths.

Chicago Style (17th ed.) Citation

Davies, Ivor Kevin, and James Hartley. Contributions to an Educational Technology. London: Butterworths, 1972.

MLA (9th ed.) Citation

Davies, Ivor Kevin, and James Hartley. Contributions to an Educational Technology. Butterworths, 1972.