(2002). Longman language activator: Helps you write and speak natural English. London: Longman.
Trích dẫn kiểu ChicagoLongman Language Activator: Helps You Write and Speak Natural English. London: Longman, 2002.
MLA CitationLongman Language Activator: Helps You Write and Speak Natural English. London: Longman, 2002.
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