Swan, M., & Walter, C. (1988). The Cambridge English course 1: Practice book [with key]. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoSwan, Michael, và Catherine Walter. The Cambridge English Course 1: Practice Book [with Key]. Cambridge: Cambridge University Press, 1988.
MLA CitationSwan, Michael, và Catherine Walter. The Cambridge English Course 1: Practice Book [with Key]. Cambridge: Cambridge University Press, 1988.
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