Crystal, D. (2003). The Cambridge encyclopedia of the English language (2nd ed.). Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoCrystal, David. The Cambridge Encyclopedia of the English Language. 2nd ed. Cambridge: Cambridge University Press, 2003.
MLA CitationCrystal, David. The Cambridge Encyclopedia of the English Language. 2nd ed. Cambridge: Cambridge University Press, 2003.
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