Παραπομπή σε μορφή APA (7η εκδ.)

Comfort, J., Rogerson, P., Stott, T., & Utley, D. (1994). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Comfort, Jeremy, Pamela Rogerson, Trish Stott, και Derek Utley. Speaking Effectively: Developing Speaking Skills for Business English. New York: Cambridge University Press, 1994.

Παραπομπή σε μορφή MLA (8th εκδ.)

Comfort, Jeremy, et al. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge University Press, 1994.