APA (7th ed.) Citation

Hills, P., Gilbert, J., & Budgett, R. E. B. (1977). The spread of educational technology. Kogan Page.

Chicago Style (17th ed.) Citation

Hills, Philip, John Gilbert, and R. E. B. Budgett. The Spread of Educational Technology. London: Kogan Page, 1977.

MLA (9th ed.) Citation

Hills, Philip, et al. The Spread of Educational Technology. Kogan Page, 1977.