Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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