Deismireacht APA

Berry, R., & Roger Berry. (1993). Collins Cobuild English guides. London: HarperCollins.

Trích dẫn kiểu Chicago

Berry, Roger, và Roger Berry. Collins Cobuild English Guides. London: HarperCollins, 1993.

Deismireacht MLA

Berry, Roger, và Roger Berry. Collins Cobuild English Guides. London: HarperCollins, 1993.

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