Comfort, J. (1984). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.
芝加哥风格引文Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1984.
MLA引文Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge University Press, 1984.
警告：这些引文格式不一定是100％准确.