Παραπομπή APA

Biber, D., & Gray, B. (2016). Grammatical complexity in a academic english: Linguistic change in writing. Cambridge University Press.

Παραπομπή Chicago Style

Biber, Douglas, και Bethany Gray. Grammatical Complexity in a Academic English: Linguistic Change in Writing. United Kingdom: Cambridge University Press, 2016.

Παραπομπή MLA

Biber, Douglas, και Bethany Gray. Grammatical Complexity in a Academic English: Linguistic Change in Writing. Cambridge University Press, 2016.