Dyfyniad APA

 Cotton, D. (2010).  Market leader: Upter Intermediate business english course book B2.  Pearson.

Dyfyniad Arddull Chicago

 Cotton, David.  Market Leader: Upter Intermediate Business English Course Book B2.  Pearson, 2010.

Dyfyniad MLA

 Cotton, David.  Market Leader: Upter Intermediate Business English Course Book B2.  Pearson, 2010.

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