Lock, G. (1999). Functional English Grammar: An introduction for second language teachers. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoLock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge: Cambridge University Press, 1999.
MLA CitationLock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge: Cambridge University Press, 1999.
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