Comfort, J., ...,, Rogerson, P., & Stott, T. (1994). Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University.
استشهاد بنمط شيكاغوComfort, Jeremy, ..., Pamela Rogerson, و Trish Stott. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University, 1994.
MLA استشهادComfort, Jeremy, ..., Pamela Rogerson, و Trish Stott. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.