Comfort, J., Comfort, J., Comfort, J., Revell, R., Simpson, I., Stott, T., & Utley, D. (1986). English for the telecommunications industry. Oxford ; New York: Oxford University Press.

Comfort, Jeremy, Jeremy Comfort, Jeremy Comfort, Rod Revell, Ian Simpson, Trish Stott, and Derek Utley. English for the Telecommunications Industry. Oxford ; New York: Oxford University Press, 1986.

Comfort, Jeremy, et al. English for the Telecommunications Industry. Oxford ; New York: Oxford University Press, 1986.