Comfort, J. (1984). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रComfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1984.
एमएलए (8वां संस्करण) प्रशस्ति पत्रComfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge University Press, 1984.
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