Comfort, J. (1984). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.
Chicago-referens (17:e uppl.)Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1984.
MLA-referens (8:e uppl.)Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge University Press, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.