Biber, D., & Gray, B. (2016). Grammatical complexity in a academic english: Linguistic change in writing. Cambridge University Press.
শিকাগো স্টাইলে সাইটেশনBiber, Douglas, এবং Bethany Gray. Grammatical Complexity in a Academic English: Linguistic Change in Writing. United Kingdom: Cambridge University Press, 2016.
এমএলএ সাইটেশনBiber, Douglas, এবং Bethany Gray. Grammatical Complexity in a Academic English: Linguistic Change in Writing. Cambridge University Press, 2016.
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